net: gptp: Drop the older pdelay req after receiving a new one
net: gptp: Drop the older pdelay req after receiving a new one

Previously the newer one got dropped.

The older ones will be dropped in a way that the follow up messages for
them will not be sent.

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

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