arm64: zynqmp: Modify chip_id routine to get either idcode or version

This patch modifies the chip_id routine to get either idcode or
silicon version based on the argument received.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/include/asm/arch-zynqmp/sys_proto.h

@@ -10,6 +10,20 @@
 
 #define PAYLOAD_ARG_CNT		5
 
+#define ZYNQMP_CSU_SILICON_VER_MASK	0xF
+
+enum {
+	IDCODE,
+	VERSION,
+};
+
+enum {
+	ZYNQMP_SILICON_V1,
+	ZYNQMP_SILICON_V2,
+	ZYNQMP_SILICON_V3,
+	ZYNQMP_SILICON_V4,
+};
+
 enum {
 	TCM_LOCK,
 	TCM_SPLIT,