ptp: idt82p33: remove PEROUT_ENABLE_OUTPUT_MASK

PEROUT_ENABLE_OUTPUT_MASK was there to allow us to enable/disable
all the perout pins. But it is not standard procedure, we will
have to discard it.

Signed-off-by: Min Li <min.li.xe@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>