misc: Remove unused params() definitions

Lots of times the params() helper has been defined but not used

Change-Id: Id71829aca71341d46964d8f071099342b946b62f
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41613
Tested-by: kokoro <noreply+kokoro@google.com>

src/dev/mips/malta_cchip.hh

@@ -76,7 +76,7 @@ class MaltaCChip : public BasicPioDevice
     //uint64_t itint;
 
   public:
-    PARAMS(MaltaCChip);
+    using Params = MaltaCChipParams;
 
     /**
      * Initialize the Malta CChip by setting all of the