ALSA: hda/tas2781: remove unnecessary runtime_pm calls

The runtime_pm handling seems to have been loosely inspired by the
cs32l41 driver, but in this case the get_noresume/put sequence is not
required.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Message-ID: <20240312161217.79510-1-pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>