drivers: soc: qcom: pm: Add legacy PM and Warmboot set address API support

Add legacy msm pm sleep mode support for MDM9607 target.

Add warmboot set address support for multi cluster cpu's.

Snapshot is taken from msm-4.9 kernel version @ commit 078db469522464
("soc: qcom: bgrsb: Increase time out for RSB channel opening").

Change-Id: Ibfc56254c47cfc1465aff5559b8846072f66041a
Signed-off-by: Raghavendra Kakarla <rkakarla@codeaurora.org>
Signed-off-by: Haribabu Gattem <haribabu@codeaurora.org>
Signed-off-by: Raja Mallik <rmallik@codeaurora.org>
Signed-off-by: Tushar Nimkar <tnimkar@codeaurora.org>