[media] ivtv: fix two smatch warnings

Smatch currently produces two warnings:
	drivers/media/pci/ivtv/ivtv-fileops.c:901 ivtv_v4l2_close() warn: suspicious bitop condition
	drivers/media/pci/ivtv/ivtv-fileops.c:1026 ivtv_open() warn: suspicious bitop condition

Those are false positives, but it is not hard to get rid of them by
using a different way to evaluate the macro, splitting the logical
boolean evaluation from the bitmap one.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/ivtv/ivtv-driver.h

@@ -830,7 +830,8 @@ static inline int ivtv_raw_vbi(const struct ivtv *itv)
 	do {								\
 		struct v4l2_subdev *__sd;				\
 		__v4l2_device_call_subdevs_p(&(itv)->v4l2_dev, __sd,	\
-			!(hw) || (__sd->grp_id & (hw)), o, f , ##args);	\
+			 !(hw) ? true : (__sd->grp_id & (hw)),		\
+			 o, f, ##args);					\
 	} while (0)
 
 #define ivtv_call_all(itv, o, f, args...) ivtv_call_hw(itv, 0, o, f , ##args)