cx25821: cx25821-medusa-reg.h: fix 0x0x prefix

Fix the 0x0x prefix in integer constants.

In this case a padding 0 must also be inserted to make the constants
look like all the other 16 bits ones.

Signed-off-by: Antonio Ospite <ao2@ao2.it>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-media@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>