Memalloc module,ALSA Core,Instrument layer
Fix the sparse warning 'implicit cast to nocast type'

File/Subsystem:sound/core
Signed-off-by: NVictor Fusco <victor@cetuc.puc-rio.br>
Signed-off-by: NDomen Puncer <domen@coderock.org>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>