Modules: ES1938 driver

This patch fixes the suspend/resume issue I'm having with ESS-Solo1
soundcard. Without this patch I might get after resume message
that kernel is disabling the IRQ5 (soundcard). If there was something
playing it wont continue after resume without this patch.
Signed-off-by: Rudolf Marek <r.marek@sh.cvut.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>