CMSIS: AArch64: avoid redefining MPIDR_AFFLVL_MASK

There's already a definition of this register in the main repo code
base, add a guard around it so it does not get redefined, fixes a build
warning.

Signed-off-by: Fabio Baltieri <[email protected]>

Author: fabiobaltieri

mcux/mcux-sdk/CMSIS/Core_AArch64/Include/core_common.h

@@ -69,7 +69,9 @@
 #define GET_EL(_mode)		(((_mode) >> MODE_EL_SHIFT) & MODE_EL_MASK)
 
 /* MPIDR */
+#ifndef MPIDR_AFFLVL_MASK
 #define MPIDR_AFFLVL_MASK	(0xfful)
+#endif
 #define MPIDR_AFF0_SHIFT	(0)
 #define MPIDR_AFF1_SHIFT	(8)
 #define MPIDR_AFF2_SHIFT	(16)