[media] rc: img-ir: hw: Remove unnecessary semi-colon

Fix a coccicheck warning in img-ir driver:
drivers/media/rc/img-ir/img-ir-hw.c:500:2-3: Unneeded semicolon

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>