fastmodel: Fix params for the IrisTLB.

Add PARAMS(), and include the params header file.

This fixes the build when fast model is enabled.

Change-Id: If4babbade9bf896084060f3f3b3b620947d0c83a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/52704
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Earl Ou <shunhsingou@google.com>

src/arch/arm/fastmodel/iris/tlb.hh

@@ -29,6 +29,7 @@
 #define __ARCH_ARM_FASTMODEL_IRIS_TLB_HH__
 
 #include "arch/generic/tlb.hh"
+#include "params/IrisTLB.hh"
 
 namespace gem5
 {
@@ -39,6 +40,8 @@ namespace Iris
 class TLB : public BaseTLB
 {
   public:
+    PARAMS(IrisTLB)
+
     TLB(const Params &p) : BaseTLB(p) {}
 
     void demapPage(Addr vaddr, uint64_t asn) override {}