media: ti: drop unexpected word 'a' in comments

there is an unexpected word 'a' in the comments that need to be dropped

file - drivers/media/platform/ti/cal/cal-camerarx.c
line - 308

 * DRA80xM TRMs have a a slightly simplified sequence.

changed to:

 * DRA80xM TRMs have a slightly simplified sequence.

Signed-off-by: Jiang Jian <jiangjian@cdjrlc.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>