efi: Correct display of table GUIDs

The printf() %pU option decodes GUIDs so it is not necessary to do this
first. Drop the incorrect code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/cmd/efi_common.c b/cmd/efi_common.c
index f405609..1aa2351 100644
--- a/cmd/efi_common.c
+++ b/cmd/efi_common.c
@@ -17,10 +17,8 @@
 
 	for (i = 0; i < systab->nr_tables; i++) {
 		struct efi_configuration_table *tab = &systab->tables[i];
-		char guid_str[37];
 
-		uuid_bin_to_str(tab->guid.b, guid_str, 1);
-		printf("%p  %pUl  %s\n", tab->table, guid_str,
+		printf("%p  %pUl  %s\n", tab->table, tab->guid.b,
 		       uuid_guid_get_str(tab->guid.b) ?: "(unknown)");
 	}
 }