xen/arm: Add C1-Ultra definitions

Add processor definitions for C1-Ultra. These will be used for errata
detection in subsequent patches.

These values can be found in the C1-Ultra TRM:

  https://developer.arm.com/documentation/108014/0100/

... in section A.5.1 ("MIDR_EL1, Main ID Register").

Signed-off-by: Michal Orzel <michal.orzel@amd.com>
Reviewed-by: Julien Grall <julien@xen.org>
(cherry picked from commit 36ddaa7918)

xen/arch/arm/include/asm/processor.h

@@ -90,6 +90,7 @@
 #define ARM_CPU_PART_NEOVERSE_V3AE  0xD83
 #define ARM_CPU_PART_NEOVERSE_V3    0xD84
 #define ARM_CPU_PART_CORTEX_X925    0xD85
+#define ARM_CPU_PART_C1_ULTRA       0xD8C
 
 #define MIDR_CORTEX_A12 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A12)
 #define MIDR_CORTEX_A17 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A17)
@@ -120,6 +121,7 @@
 #define MIDR_NEOVERSE_V3AE MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_V3AE)
 #define MIDR_NEOVERSE_V3 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_V3)
 #define MIDR_CORTEX_X925 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_X925)
+#define MIDR_C1_ULTRA MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_C1_ULTRA)
 
 /* MPIDR Multiprocessor Affinity Register */
 #define _MPIDR_UP           (30)