ACPICA: Tables: Cleanup table checksum verification code.

This patch reduces code redundancy by moving the FACS/S3PT checksum
verification skip logic into acpi_tb_verify_checksum() and other
calls of this function also get benefit from this change.  Lv Zheng.
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpica/tbinstal.c

@@ -80,16 +80,10 @@ acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
 		}
 	}
 
-	/* FACS is the odd table, has no standard ACPI header and no checksum */
-
-	if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
-
 	/* Always calculate checksum, ignore bad checksum if requested */
 
 	status =
-		    acpi_tb_verify_checksum(table_desc->pointer,
-					    table_desc->length);
-	}
+	    acpi_tb_verify_checksum(table_desc->pointer, table_desc->length);
 
 	return_ACPI_STATUS(status);
 }

drivers/acpi/acpica/tbprint.c

@@ -190,6 +190,16 @@ acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length)
 {
 	u8 checksum;
 
+	/*
+	 * FACS/S3PT:
+	 * They are the odd tables, have no standard ACPI header and no checksum
+	 */
+
+	if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_S3PT) ||
+	    ACPI_COMPARE_NAME(table->signature, ACPI_SIG_FACS)) {
+		return (AE_OK);
+	}
+
 	/* Compute the checksum on the table */
 
 	checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length);