drivers: net: rmnet: Power collapse UL change

Disable Power Save on UDP UL. Previously UL packets
did not cause us to reregister for indications.
This fixes that usecase to allow UL traffic to
also break out of powersave mode.

CRs-Fixed: 2277101
Change-Id: I9e74a4ab06fbba2d73f32070545b8db107770e81
Acked-by: Raul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>