[PATCH] change the SOUND_PRIME handling

SOUND_PRIME (for OSS) is a tristate.

This doesn't make much sense if most users are checking for
SOUND_PRIME!=0.

This patch changes the semantics of SOUND_PRIME to being a limit for all
OSS modules, IOW: SOUND_PRIME=m does now say that all OSS drivers can
only be modular.

As a side effect, since SOUND_PRIME already depends on SOUND, there's no
longer a reason for drivers depending on SOUND_PRIME to additionally
depend on SOUND.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>