media: include/uapi/linux/cec.h: typo: SATERDAY -> SATURDAY

Fix typo in a define: CEC_OP_REC_SEQ_SATERDAY -> CEC_OP_REC_SEQ_SATURDAY

This isn't used yet in actual applications to the best of my knowledge,
and it certainly doesn't break the ABI since the value doesn't change.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>