lib/cpus: update MIDR value for rainier cpu

This patch updates the MIDR value for rainier cpu.

Change-Id: I99a5d96f757239cf65b2688095c4ec66cd991cf9
Signed-off-by: Jagadeesh Ujja <jagadeesh.ujja@arm.com>

include/lib/cpus/aarch64/rainier.h

@@ -10,7 +10,7 @@
 #include <lib/utils_def.h>
 
 /* RAINIER MIDR for revision 0 */
-#define RAINIER_MIDR			U(0x3f0f4100)
+#define RAINIER_MIDR			U(0x3f0f4120)
 
 /* Exception Syndrome register EC code for IC Trap */
 #define RAINIER_EC_IC_TRAP		U(0x1f)