fix(rmm): replace ARRAY_READ/WRITE macros with direct read/write

In sysregs.c 'rt' index of reads/writes from/to 'rec->regs[rt]'
is being checked for maximum possible value of 31 corresonding
to XZR and all these cases are handled safely, so there is no
need for using ARRAY_READ/WRITE macros which cause performance
deterioration.
This patch replaces usage of ARRAY_READ/WRITE macros with direct
read and writes commands and renames those macros to
SAFE_ARRAY_READ/WRITE.
The patch removes 'esr_sysreg_rt()' inline function
defined in esr.h and replaces calls to it with modified
ESR_EL2_SYSREG_ISS_RT macro.

Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
Change-Id: Ib2d9996ef380ffb9cdcafa320ded9fa991d9a378
diff --git a/lib/common/include/utils_def.h b/lib/common/include/utils_def.h
index 2dc310a..604cd6e 100644
--- a/lib/common/include/utils_def.h
+++ b/lib/common/include/utils_def.h
@@ -85,7 +85,7 @@
  * _i: index
  * _v: variable/value to write
  */
-#define	ARRAY_READ(_a, _i, _v)		\
+#define	SAFE_ARRAY_READ(_a, _i, _v)	\
 ({					\
 	CHECK_ARRAY_TYPE(_a, _v);	\
 	if (_i >= ARRAY_SIZE(_a)) {	\
@@ -94,7 +94,7 @@
 	_v = _a[_i];			\
 })
 
-#define	ARRAY_WRITE(_a, _i, _v)		\
+#define	SAFE_ARRAY_WRITE(_a, _i, _v)	\
 ({					\
 	CHECK_ARRAY_TYPE(_a, _v);	\
 	if (_i >= ARRAY_SIZE(_a)) {	\