firmware: efi: Remove unneeded guid unparse

There is no reason to translate guid number to string here.
So remove it in order to not do unneeded work.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 9bdbc05..f8f1268 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -277,15 +277,10 @@
 				     unsigned long table,
 				     efi_config_table_type_t *table_types)
 {
-	u8 str[EFI_VARIABLE_GUID_LEN + 1];
 	int i;
 
 	if (table_types) {
-		efi_guid_to_str(guid, str);
-
 		for (i = 0; efi_guidcmp(table_types[i].guid, NULL_GUID); i++) {
-			efi_guid_to_str(&table_types[i].guid, str);
-
 			if (!efi_guidcmp(*guid, table_types[i].guid)) {
 				*(table_types[i].ptr) = table;
 				pr_cont(" %s=0x%lx ",