ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put()

ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put()

This reverts commit f51424872760 ("ASoC: fsl_xcvr: fix missing lock in fsl_xcvr_mode_put()").

The original patch attempted to acquire the card->controls_rwsem lock in
fsl_xcvr_mode_put(). However, this function is called from the upper ALSA
core function snd_ctl_elem_write(), which already holds the write lock on
controls_rwsem for the whole put operation. So there is no need to simply
hold the lock for fsl_xcvr_activate_ctl() again.

Acquiring the read lock while holding the write lock in the same thread
results in a deadlock and a hung task, as reported by Alexander Stein.

Fixes: f51424872760 ("ASoC: fsl_xcvr: fix missing lock in fsl_xcvr_mode_put()")
Reported-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Closes: https://lore.kernel.org/linux-sound/5056506.GXAFRqVoOG@steina-w/
Signed-off-by: Ziyi Guo <n7l8m4@u.northwestern.edu>
Link: https://patch.msgid.link/20260210185714.556385-1-n7l8m4@u.northwestern.edu
Signed-off-by: Mark Brown <broonie@kernel.org>