ALSA: Enable build with m68k

By some reason in the ancient history, we disabled the build of ALSA
drivers for m68k.  Since we'd like to move sound/oss/dmasound stuff
into ALSA for the complete drop of the legacy OSS stuff, let's try to
start building with m68k.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/Kconfig

@@ -56,7 +56,7 @@ config SOUND_OSS_CORE_PRECLAIM
 
 source "sound/oss/dmasound/Kconfig"
 
-if !M68K && !UML
+if !UML
 
 menuconfig SND
 	tristate "Advanced Linux Sound Architecture"
@@ -125,7 +125,7 @@ source "sound/oss/Kconfig"
 
 endif # SOUND_PRIME
 
-endif # !M68K
+endif # !UML
 
 endif # SOUND