ARM: stm32mp: correctly handle Silicon revision

Handle correctly the silicon revision = REV_ID[15:0] of Device Version
and the associated device marking, A to Z on STMicroelectronics STM32MP
SOCs.

This patch prepare the introduction of next STM32MP family,
with STM32MP13x Rev.Z for REV_ID = 1.1.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/include/mach/sys_proto.h b/arch/arm/mach-stm32mp/include/mach/sys_proto.h
index 4149d3a..b91f98e 100644
--- a/arch/arm/mach-stm32mp/include/mach/sys_proto.h
+++ b/arch/arm/mach-stm32mp/include/mach/sys_proto.h
@@ -25,11 +25,12 @@
 /* return CPU_DEV constants */
 u32 get_cpu_dev(void);
 
-#define CPU_REVA	0x1000
-#define CPU_REVB	0x2000
-#define CPU_REVZ	0x2001
+#define CPU_REV1	0x1000
+#define CPU_REV1_1	0x1001
+#define CPU_REV2	0x2000
+#define CPU_REV2_1	0x2001
 
-/* return CPU_REV constants */
+/* return Silicon revision = REV_ID[15:0] of Device Version */
 u32 get_cpu_rev(void);
 
 /* Get Package options from OTP */