misc: Rename Enums namespace as enums

As part of recent decisions regarding namespace
naming conventions, all namespaces will be changed
to snake case.

::Enums became ::enums.

Change-Id: I39b5fb48817ad16abbac92f6254284b37fc90c40
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45420
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/base/imgwriter.cc

@@ -47,10 +47,10 @@
 #endif
 
 std::unique_ptr<ImgWriter>
-createImgWriter(Enums::ImageFormat type, const FrameBuffer *fb)
+createImgWriter(enums::ImageFormat type, const FrameBuffer *fb)
 {
     switch (type) {
-      case Enums::Auto:
+      case enums::Auto:
         // The Auto option allows gem5 to choose automatically the
         // writer type, and it will choose for the best fit in
         // performance.
@@ -59,10 +59,10 @@ createImgWriter(Enums::ImageFormat type, const FrameBuffer *fb)
 
         GEM5_FALLTHROUGH;
 #if HAVE_PNG
-      case Enums::Png:
+      case enums::Png:
         return std::unique_ptr<PngWriter>(new PngWriter(fb));
 #endif
-      case Enums::Bitmap:
+      case enums::Bitmap:
         return std::unique_ptr<BmpWriter>(new BmpWriter(fb));
       default:
         warn("Invalid Image Type specified, defaulting to Bitmap\n");

src/base/imgwriter.hh

@@ -85,6 +85,6 @@ class ImgWriter
  * @return smart pointer to the allocated Image Writer
  */
 std::unique_ptr<ImgWriter>
-createImgWriter(Enums::ImageFormat type, const FrameBuffer *fb);
+createImgWriter(enums::ImageFormat type, const FrameBuffer *fb);
 
 #endif //__BASE_IMGWRITER_HH__

src/base/vnc/vncinput.hh

@@ -236,7 +236,7 @@ class VncInput : public SimObject
     std::unique_ptr<ImgWriter> captureImage;
 
     /** image format */
-    Enums::ImageFormat imgFormat;
+    enums::ImageFormat imgFormat;
 
     /** Captures the current frame buffer to a file */
     void captureFrameBuffer();