msm: pcie: add PCIPM L1.1 and L1.2 support

Enable PCIPM L1.1 and L1.2 for root complex and endpoint
if they both support it.

Change-Id: I6eaf26867f410aa24b7cd08d2f1af4d7635be25b
Signed-off-by: Tony Truong <truong@codeaurora.org>