drm/vc4: hdmi: Rework the pre_crtc_configure error handling

Since our pre_crtc_configure hook returned void, we didn't implement a
goto-based error path handling, leading to errors like failing to put
back the device in pm_runtime in all the error paths, but also failing
to disable the pixel clock if clk_set_min_rate on the HSM clock fails.

Move to a goto-based implementation to have an easier consitency.

Fixes: 4f6e3d66 ("drm/vc4: Add runtime PM support to the HDMI encoder driver")
Link: https://patchwork.freedesktop.org/patch/msgid/20210819135931.895976-4-maxime@cerno.tech


Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>