drivers: net: rmnet: task boost with userspace

Allows userspace to evaluate uplink data rates per pid so that a
boost can be applied after reaching a threshold.

Change-Id: I11be0542c0b40190b61eba445ce9dad75fd6603d
Acked-by: Ryan Chapman <rchapman@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>