msm: Wall clock kernel module

This driver simulates the wall-clock hardware block on fsm8064_ep
femto emulation platform. This block will be used to provide
clock information to the LTE Layer 2 module running on the hexagon
processor

Change-Id: I017f61b9b0c175eb4f2f8129b5c63c9bd489ae38
Acked-by: Jie Luo <jluo@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>