[ALSA] ad1848: fix AD1848P macro

Consistent variable naming is a good thing, but let's be a little less
sneaky about enforcing it... ;-/
Signed-off-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

include/sound/ad1848.h

@@ -27,7 +27,7 @@
 
 /* IO ports */
 
-#define AD1848P( codec, x ) ( (chip) -> port + c_d_c_AD1848##x )
+#define AD1848P( chip, x ) ( (chip) -> port + c_d_c_AD1848##x )
 
 #define c_d_c_AD1848REGSEL	0
 #define c_d_c_AD1848REG		1