ACPI: suppress uninitialized var warning

drivers/acpi/tables/tbutils.c: In function `acpi_tb_parse_root_table':
drivers/acpi/tables/tbutils.c:403: warning: `rsdt_address' may be used uninitialized in this function

Reported-by: Uwe Bugla <uwe.bugla@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/tables/tbutils.c

@@ -400,7 +400,7 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags)
 	u32 table_count;
 	struct acpi_table_header *table;
 	acpi_physical_address address;
-	acpi_physical_address rsdt_address;
+	acpi_physical_address uninitialized_var(rsdt_address);
 	u32 length;
 	u8 *table_entry;
 	acpi_status status;