ACPI: NUMA: Remove the useless sub table pointer check

In acpi_parse_entries_array(), the subtable entries (entry.hdr)
will never be NULL, so for ACPI subtable handler in struct
acpi_subtable_proc, will never handle NULL subtable entries.

Remove those useless subtable pointer checks in the callback
handlers.
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/numa/srat.c

@@ -291,8 +291,6 @@ acpi_parse_x2apic_affinity(union acpi_subtable_headers *header,
 	struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
 
 	processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
-	if (!processor_affinity)
-		return -EINVAL;
 
 	acpi_table_print_srat_entry(&header->common);
 
@@ -309,8 +307,6 @@ acpi_parse_processor_affinity(union acpi_subtable_headers *header,
 	struct acpi_srat_cpu_affinity *processor_affinity;
 
 	processor_affinity = (struct acpi_srat_cpu_affinity *)header;
-	if (!processor_affinity)
-		return -EINVAL;
 
 	acpi_table_print_srat_entry(&header->common);
 
@@ -327,8 +323,6 @@ acpi_parse_gicc_affinity(union acpi_subtable_headers *header,
 	struct acpi_srat_gicc_affinity *processor_affinity;
 
 	processor_affinity = (struct acpi_srat_gicc_affinity *)header;
-	if (!processor_affinity)
-		return -EINVAL;
 
 	acpi_table_print_srat_entry(&header->common);
 
@@ -347,8 +341,6 @@ acpi_parse_memory_affinity(union acpi_subtable_headers * header,
 	struct acpi_srat_mem_affinity *memory_affinity;
 
 	memory_affinity = (struct acpi_srat_mem_affinity *)header;
-	if (!memory_affinity)
-		return -EINVAL;
 
 	acpi_table_print_srat_entry(&header->common);