Make arche_platform_fw_flashing_seq() return error value, needed later when we add clock enable support for FW flashing. Testing Done: Tested on EVT1.5 platform. Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org> Tested-by: Michael Scott <michael.scott@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>