ALSA: sound/usb/usx2y: simplify conditional

Simplify conditional: (a || (!a && b)) => (a || b)

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/usx2y/usx2yhwdeppcm.c

@@ -54,7 +54,7 @@
 #include <linux/gfp.h>
 #include "usbusx2yaudio.c"
 
-#if defined(USX2Y_NRPACKS_VARIABLE) || (!defined(USX2Y_NRPACKS_VARIABLE) &&  USX2Y_NRPACKS == 1)
+#if defined(USX2Y_NRPACKS_VARIABLE) || USX2Y_NRPACKS == 1
 
 #include <sound/hwdep.h>