ptp: ptp_clockmatrix: return -EBUSY if phase pull-in is in progress

Also removes PEROUT_ENABLE_OUTPUT_MASK

Signed-off-by: Min Li <min.li.xe@renesas.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://lore.kernel.org/r/1652712427-14703-2-git-send-email-min.li.xe@renesas.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>