ptp: fc3: remove redundant check on variable ret

The check on ret has already been performed a few statements earlier
and ret has not been re-assigned and so the re-checking is redundant.
Clean up the code by removing the redundant check.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://patch.msgid.link/20241031135042.3250614-1-colin.i.king@gmail.com


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