msm: pcie: support the access control to PCIe space

Add the support for PCIe client drivers to request the access
control of PCIe address range.

CRs-fixed: 690577
Change-Id: Ia6a0180f82d4f8e01b721313d2834e20c4d20ca2
Signed-off-by: Yan He <yanhe@codeaurora.org>