feat(amu): test AMU counter restriction (RAZ)

When using AMU counters, there is risk of exposing information to
lower exception levels. In order to prevent this, counters are
restricted, so they are read as zero (RAZ) at a lower EL. This
test verifies that counters are read as zero after forcing counting
through instructions that trigger MPMM "gear shifting" (e.g.: by
executing SVE instructions).

Note: This test applies to TC2 only, as it is the only platform that
      supports MPMM currently.

Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
Change-Id: Ic32ba19fa489cf479947d4467ddb84e6abd1b454
diff --git a/Makefile b/Makefile
index f88cd3f..b848c23 100644
--- a/Makefile
+++ b/Makefile
@@ -196,6 +196,7 @@
 $(eval $(call add_define,TFTF_DEFINES,USE_NVM))
 $(eval $(call add_define,TFTF_DEFINES,ENABLE_REALM_PAYLOAD_TESTS))
 $(eval $(call add_define,TFTF_DEFINES,TRANSFER_LIST))
+$(eval $(call add_define,TFTF_DEFINES,PLAT_AMU_GROUP1_COUNTERS_MASK))
 
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