remoteproc/mediatek: unprepare clk if scp_before_load fails

remoteproc/mediatek: unprepare clk if scp_before_load fails

[ Upstream commit 22c3df6f5574c8d401ea431c7ce24e7c5c5e7ef3 ]

Fixes the error handling to unprepare clk if scp_before_load fails.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Fixes: fd0b6c1ff85a ("remoteproc/mediatek: Add support for mt8192 SCP")
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20201203155914.3844426-1-tzungbi@google.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>