perf: arm_cspmu: Fix build failure on x86_64

Building on x86_64 allmodconfig failed:
  | drivers/perf/arm_cspmu/arm_cspmu.c:1114:29: error: implicit
  |    declaration of function 'get_acpi_id_for_cpu'

get_acpi_id_for_cpu is a helper function from ARM64.
Fix by adding ARM64 dependency.
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20221116190455.55651-1-bwicaksono@nvidia.comSigned-off-by: Will Deacon <will@kernel.org>

drivers/perf/arm_cspmu/Kconfig

@@ -4,7 +4,7 @@
 
 config ARM_CORESIGHT_PMU_ARCH_SYSTEM_PMU
 	tristate "ARM Coresight Architecture PMU"
-	depends on ACPI
+	depends on ARM64 && ACPI
 	depends on ACPI_APMT || COMPILE_TEST
 	help
 	  Provides support for performance monitoring unit (PMU) devices