ASoC: max98088: remove use of __devexit_p

CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer
needed, remove it.

Also fix the indentation for the initialization of the
max98088_i2c_driver struct to make chkpatch happy.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>