net: gptp: Fix port number in SYN and FUP packets
net: gptp: Fix port number in SYN and FUP packets

Make sure the packets contain the port number they are actually coming
from.

Signed-off-by: Tomasz Gorochowik <265c7c25eca9aa9127910457b0aea7e793d329f1@antmicro.com>

explora26/zephyr,finikorg/zephyr,nashif/zephyr,explora26/zephyr,explora26/zephyr,ldts/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,finikorg/zephyr,ldts/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,ldts/zephyr,Vudentz/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,Vudentz/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,galak/zephyr,punitvara/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,ldts/zephyr,explora26/zephyr,punitvara/zephyr,nashif/zephyr,Vudentz/zephyr,punitvara/zephyr,nashif/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr