Revert "media: Fix typo in mixer_drv.c and hdmi_drv.c"

This reverts commit 382d19f1, as the
changes in question are done in v4l tree differently.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>