drivers: soc: qcom: Snapshot of idle/sleep driver as of msm-4.4

This is a snapshot of the Sleep driver and realted functionality as of
'commit b67bb93f565e ("power: reset: Do not disable SDI during reset")'
on msm-4.4 branch.

Moved Energy Awareness driver and Idle stats driver from
drivers/power/qcom to drivers/soc/qcom.

Remove lpm-workarounds file that no longer is applicable on newer
branches.

Updated the patch to fix some checkpatch issues
	- Use WARN
	- White space issues
	- Replace S_IRUGO etc
	- Remove return on void functions
	- Add function arguments
	- unsigned -> unsigned int
	- Add comments around wmb, mb.
	- Fix comment styles
	- kzalloc to kcalloc
	- Updated MSM_PM Kconfig help
	- Remove references to spm.h and file

Change-Id: I98fec26849898c5c66abbb1b094439780c23964d
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
Signed-off-by: Lina Iyer <ilina@codeaurora.org>