feat(trf): add trace filter control registers access test

Added a test to read trace filter control registers to ensure that EL3
is giving permission to non-secure EL2 to access these registers.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I9354d8592bd187206add717b9d3b0206382a06d3
diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h
index cb10cfe..b1090d1 100644
--- a/include/lib/aarch64/arch_helpers.h
+++ b/include/lib/aarch64/arch_helpers.h
@@ -498,6 +498,10 @@
 DEFINE_RENAME_SYSREG_RW_FUNCS(trbtrg_el1, TRBTRG_EL1)
 DEFINE_RENAME_SYSREG_READ_FUNC(trbidr_el1, TRBIDR_EL1)
 
+/* Armv8.4 Trace filter control System Registers */
+DEFINE_RENAME_SYSREG_RW_FUNCS(trfcr_el1, TRFCR_EL1)
+DEFINE_RENAME_SYSREG_RW_FUNCS(trfcr_el2, TRFCR_EL2)
+
 #define IS_IN_EL(x) \
 	(GET_EL(read_CurrentEl()) == MODE_EL##x)