Add toggle bit to struct img_ir_scancode_req so that protocols can
provide it to img_ir_handle_data(), and pass that toggle bit up to
rc_keydown instead of 0.

This is needed for the upcoming rc-5 and rc-6 patches.
Signed-off-by: Sifan Naeem <sifan.naeem@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>