net: ti: prueth_core: prp: drop rct for normal case

Currently RCT is part of the payload delivered to network
stack which is not right. So drop Tag if transparent
reception setting is IEC62439_3_TR_REMOVE_RCT.

Fixes: a9b8608a

 ("net: ti: prueth_core: add HSR/PRP driver")

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>