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>

drivers/firmware/efi/efi-stub-helper.c

@@ -170,7 +170,6 @@ static efi_status_t efi_high_alloc(efi_system_table_t *sys_table_arg,
 		*addr = max_addr;
 	}
 
-free_pool:
 	efi_call_phys1(sys_table_arg->boottime->free_pool, map);
 
 fail:
@@ -244,7 +243,6 @@ static efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg,
 	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 @@ static efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
 
 			if (*str == '/') {
 				*p++ = '\\';
-				*str++;
+				str++;
 			} else {
 				*p++ = *str++;
 			}