feat(neoverse-rd): enable AMU if supported by the platform

Set build-option ENABLE_FEAT_AMU to 2 for RD-V1 and RD-V1-MC so that AMU
is enabled if the feature is implemented on these platforms. This would
ensure that lower ELs could access system registers relevant to AMU
without causing a trap to EL3.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: I4d34db0c102c786f34103746064e22600d28da33

plat/arm/board/neoverse_rd/platform/rdv1/platform.mk

@@ -58,7 +58,7 @@ NT_FW_CONFIG		:=	${BUILD_PLAT}/fdts/${PLAT}_nt_fw_config.dtb
 $(eval $(call TOOL_ADD_PAYLOAD,${NT_FW_CONFIG},--nt-fw-config,${NT_FW_CONFIG}))
 
 override CTX_INCLUDE_AARCH32_REGS	:= 0
-override ENABLE_FEAT_AMU		:= 1
+override ENABLE_FEAT_AMU		:= 2
 
 ifneq ($(NRD_PLATFORM_VARIANT),0)
  $(error "NRD_PLATFORM_VARIANT for RD-V1 should always be 0, \

plat/arm/board/neoverse_rd/platform/rdv1mc/platform.mk

@@ -69,7 +69,7 @@ NT_FW_CONFIG		:=	${BUILD_PLAT}/fdts/${PLAT}_nt_fw_config.dtb
 $(eval $(call TOOL_ADD_PAYLOAD,${NT_FW_CONFIG},--nt-fw-config,${NT_FW_CONFIG}))
 
 override CTX_INCLUDE_AARCH32_REGS	:= 0
-override ENABLE_FEAT_AMU		:= 1
+override ENABLE_FEAT_AMU		:= 2
 
 ifneq ($(NRD_PLATFORM_VARIANT),0)
  $(error "NRD_PLATFORM_VARIANT for RD-V1-MC should always be 0, \