Add kexec hardboot support for Nexus 7 2013 WIFI/LTE(flo/deb)

This will allow for multirom use. Credit for the patch goes to tasssadar from XDA i only merge to slim.

Change-Id: I7642ce8ee2fc19c6e45e50f93e14b507f24da638
kernel_flo: Command line options

Conflicts:
	drivers/input/lid.c

Change-Id: I5ec17527292e4b831133d6eaf7ca191764f296d1
Signed-off-by: flar2 <asegaert@gmail.com>