[media] media: bcm2048: fix several macros

Some of the macros didn't use the parenthesis around the parameters when
used in the body of the macro.

Signed-off-by: Nikola Jelic <nikola.jelic83@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/bcm2048/radio-bcm2048.c

@@ -177,12 +177,12 @@
 
 #define BCM2048_FREQDEV_UNIT		10000
 #define BCM2048_FREQV4L2_MULTI		625
-#define dev_to_v4l2(f)	((f * BCM2048_FREQDEV_UNIT) / BCM2048_FREQV4L2_MULTI)
-#define v4l2_to_dev(f)	((f * BCM2048_FREQV4L2_MULTI) / BCM2048_FREQDEV_UNIT)
+#define dev_to_v4l2(f)	(((f) * BCM2048_FREQDEV_UNIT) / BCM2048_FREQV4L2_MULTI)
+#define v4l2_to_dev(f)	(((f) * BCM2048_FREQV4L2_MULTI) / BCM2048_FREQDEV_UNIT)
 
-#define msb(x)                  ((u8)((u16)x >> 8))
-#define lsb(x)                  ((u8)((u16)x &  0x00FF))
-#define compose_u16(msb, lsb)	(((u16)msb << 8) | lsb)
+#define msb(x)                  ((u8)((u16)(x) >> 8))
+#define lsb(x)                  ((u8)((u16)(x) &  0x00FF))
+#define compose_u16(msb, lsb)	(((u16)(msb) << 8) | (lsb))
 
 #define BCM2048_DEFAULT_POWERING_DELAY	20
 #define BCM2048_DEFAULT_REGION		0x02
@@ -2016,7 +2016,7 @@ static ssize_t bcm2048_##prop##_read(struct device *dev,		\
 	if (!bdev)							\
 		return -ENODEV;						\
 									\
-	out = kzalloc(size + 1, GFP_KERNEL);				\
+	out = kzalloc((size) + 1, GFP_KERNEL);				\
 	if (!out)							\
 		return -ENOMEM;						\
 									\