efi: resolve warnings found on ARM compile

warnings from gcc:
warning: label 'free_pool' defined but not used [-Wunused-label]
warning: value computed is not used [-Wunused-value]

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c
index 4252d01..cc0581d 100644
--- a/drivers/firmware/efi/efi-stub-helper.c
+++ b/drivers/firmware/efi/efi-stub-helper.c
@@ -170,7 +170,6 @@
 		*addr = max_addr;
 	}
 
-free_pool:
 	efi_call_phys1(sys_table_arg->boottime->free_pool, map);
 
 fail:
@@ -244,7 +243,6 @@
 	if (i == map_size / desc_size)
 		status = EFI_NOT_FOUND;
 
-free_pool:
 	efi_call_phys1(sys_table_arg->boottime->free_pool, map);
 fail:
 	return status;
@@ -360,7 +358,7 @@
 
 			if (*str == '/') {
 				*p++ = '\\';
-				*str++;
+				str++;
 			} else {
 				*p++ = *str++;
 			}