ACPI: Add LoongArch support for ACPI_PROCESSOR/ACPI_NUMA

We are preparing to add new Loongson (based on LoongArch, not MIPS)
support. LoongArch use ACPI other than DT as its boot protocol, so
add its support for ACPI_PROCESSOR/ACPI_NUMA.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/Kconfig

@@ -280,9 +280,9 @@ config ACPI_CPPC_LIB
 
 config ACPI_PROCESSOR
 	tristate "Processor"
-	depends on X86 || IA64 || ARM64
+	depends on X86 || IA64 || ARM64 || LOONGARCH
 	select ACPI_PROCESSOR_IDLE
-	select ACPI_CPU_FREQ_PSS if X86 || IA64
+	select ACPI_CPU_FREQ_PSS if X86 || IA64 || LOONGARCH
 	default y
 	help
 	  This driver adds support for the ACPI Processor package. It is required

drivers/acpi/numa/Kconfig

@@ -2,7 +2,7 @@
 config ACPI_NUMA
 	bool "NUMA support"
 	depends on NUMA
-	depends on (X86 || IA64 || ARM64)
+	depends on (X86 || IA64 || ARM64 || LOONGARCH)
 	default y if IA64 || ARM64
 
 config ACPI_HMAT

drivers/acpi/numa/srat.c

@@ -206,7 +206,7 @@ int __init srat_disabled(void)
 	return acpi_numa < 0;
 }
 
-#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
+#if defined(CONFIG_X86) || defined(CONFIG_ARM64) || defined(CONFIG_LOONGARCH)
 /*
  * Callback for SLIT parsing.  pxm_to_node() returns NUMA_NO_NODE for
  * I/O localities since SRAT does not list them.  I/O localities are

include/linux/acpi.h

@@ -249,7 +249,7 @@ void acpi_table_print_madt_entry (struct acpi_subtable_header *madt);
 /* the following numa functions are architecture-dependent */
 void acpi_numa_slit_init (struct acpi_table_slit *slit);
 
-#if defined(CONFIG_X86) || defined(CONFIG_IA64)
+#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_LOONGARCH)
 void acpi_numa_processor_affinity_init (struct acpi_srat_cpu_affinity *pa);
 #else
 static inline void