ALSA: asihpi - fix return value of hpios_locked_mem_alloc()

Make this function consistent with others in this module by
returning 1 for error, instead of -ENOMEM
(reverts function signature change from a938fb1e

)

Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>