ARM: Tegra: Sample uS timer to measure LP resume

ARM: Tegra: Sample uS timer to measure LP resume

Add framework to log microsecond timer for measuring suspend/deep-sleep
resume times from power-on to display-on

Bug 1252226

Change-Id: Icbf890f3766d38093eea485a7261303ae73d2567
Signed-off-by: Kamal Kannan Balagopalan <kbalagopalan@nvidia.com>
Reviewed-on: http://git-master/r/217939
(cherry picked from commit 4b495256ae27012f12d1b334ef5b965bf3dae8d0)
Reviewed-on: http://git-master/r/219448
Reviewed-by: Riham Haidar <rhaidar@nvidia.com>
Tested-by: Riham Haidar <rhaidar@nvidia.com>