[media] drxd_hard: remove unused SIZEOF_ARRAY

SIZEOF_ARRAY is not used (anymore). Besides, ARRAY_SIZE, defined in
include/linux/kernel.h, should be used rather than explicitly coding some
variant of it.
Signed-off-by: Christoph Jaeger <christophjaeger@linux.com>
Reviewed-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/dvb-frontends/drxd_hard.c

@@ -46,10 +46,6 @@
 #define DRX_I2C_MODEFLAGS     0xC0
 #define DRX_I2C_FLAGS         0xF0
 
-#ifndef SIZEOF_ARRAY
-#define SIZEOF_ARRAY(array) (sizeof((array))/sizeof((array)[0]))
-#endif
-
 #define DEFAULT_LOCK_TIMEOUT    1100
 
 #define DRX_CHANNEL_AUTO 0