misc: Fix coding style for struct's opening braces

The systemc dir was not included in this fix.

First it was identified that there were only occurrences
at 0, 1, 2 and 3 levels of indentation (and a single
occurrence of 2 and 3 spaces), using:

    grep -nrE --exclude-dir=systemc \
        "^ *struct [A-Za-z].* {$" src/

Then the following commands were run to replace:

<indent level>struct X ... {

by:

<indent level>struct X ...
<indent level>{

Level 0:
    grep -nrl --exclude-dir=systemc
        "^struct [A-Za-z].* {$" src/ | \
        xargs sed -Ei \
        's/^struct ([A-Za-z].*) \{$/struct \1\n\{/g'

Level 1:
    grep -nrl --exclude-dir=systemc \
        "^    struct [A-Za-z].* {$" src/ | \
        xargs sed -Ei \
        's/^    struct ([A-Za-z].*) \{$/    struct \1\n    \{/g'

and so on.

Change-Id: I362ef58c86912dabdd272c7debb8d25d587cd455
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/39017
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/dev/virtio/base.hh

@@ -464,7 +464,8 @@ class VirtQueue : public Serializable
         typedef uint16_t Flags;
         typedef uint16_t Index;
 
-        struct M5_ATTR_PACKED Header {
+        struct M5_ATTR_PACKED Header
+        {
             Flags flags;
             Index index;
         };

src/dev/virtio/block.hh

@@ -81,7 +81,8 @@ class VirtIOBlock : public VirtIODeviceBase
      * @note This needs to be changed if the supported feature set
      * changes!
      */
-    struct M5_ATTR_PACKED Config {
+    struct M5_ATTR_PACKED Config
+    {
         uint64_t capacity;
     };
     Config config;
@@ -122,7 +123,8 @@ class VirtIOBlock : public VirtIODeviceBase
     /** @} */
 
     /** VirtIO block device request as sent by guest */
-    struct M5_ATTR_PACKED BlkRequest {
+    struct M5_ATTR_PACKED BlkRequest
+    {
         RequestType type;
         uint32_t reserved;
         uint64_t sector;

src/dev/virtio/console.hh

@@ -77,7 +77,8 @@ class VirtIOConsole : public VirtIODeviceBase
      * @note This needs to be changed if the multiport feature is
      * announced!
      */
-    struct M5_ATTR_PACKED Config {
+    struct M5_ATTR_PACKED Config
+    {
         uint16_t cols;
         uint16_t rows;
     };

src/dev/virtio/fs9p.cc

@@ -60,7 +60,8 @@
 #include "params/VirtIO9PSocket.hh"
 #include "sim/system.hh"
 
-struct P9MsgInfo {
+struct P9MsgInfo
+{
     P9MsgInfo(P9MsgType _type, std::string _name)
         : type(_type), name(_name) {}
 

src/dev/virtio/fs9p.hh

@@ -50,7 +50,8 @@ struct VirtIO9PBaseParams;
 typedef uint8_t P9MsgType;
 typedef uint16_t P9Tag;
 
-struct M5_ATTR_PACKED P9MsgHeader {
+struct M5_ATTR_PACKED P9MsgHeader
+{
     /** Length including header */
     uint32_t len;
     /** Message type */
@@ -120,7 +121,8 @@ class VirtIO9PBase : public VirtIODeviceBase
      * @note The fields in this structure depend on the features
      * exposed to the guest.
      */
-    struct M5_ATTR_PACKED Config {
+    struct M5_ATTR_PACKED Config
+    {
         uint16_t len;
         char tag[];
     };

src/dev/virtio/virtio_ring.h

@@ -59,7 +59,8 @@
 #define VIRTIO_RING_F_EVENT_IDX		29
 
 /* Virtio ring descriptors: 16 bytes.  These can chain together via "next". */
-struct vring_desc {
+struct vring_desc
+{
     /* Address (guest-physical). */
     uint64_t addr;
     /* Length. */
@@ -70,27 +71,31 @@ struct vring_desc {
     uint16_t next;
 };
 
-struct vring_avail {
+struct vring_avail
+{
     uint16_t flags;
     uint16_t idx;
     uint16_t ring[];
 };
 
 /* u32 is used here for ids for padding reasons. */
-struct vring_used_elem {
+struct vring_used_elem
+{
     /* Index of start of used descriptor chain. */
     uint32_t id;
     /* Total length of the descriptor chain which was used (written to) */
     uint32_t len;
 };
 
-struct vring_used {
+struct vring_used
+{
     uint16_t flags;
     uint16_t idx;
     struct vring_used_elem ring[];
 };
 
-struct vring {
+struct vring
+{
     unsigned int num;
 
     struct vring_desc *desc;