MLK-25881: Move HDMI RX uevent to after HDMI RX signal is acquired

The uevent should be sent after the HDMI RX signal is acquired and the receivier is ready to capture images.

Signed-off-by: Oliver F. Brown <oliver.brown@nxp.com>
Reviewed-by: Sandor Yu <Sandor.yu@nxp.com>
(cherry picked from commit 79e9522a1ec65e82b877f8b80b65d08859d2d2e3)