msm: pcie: Select proper PCIe PHY initialization sequence

Select proper PCIe phy initialization sequence based on the reference clock
setting for fsm9900.

Change-Id: I55f0608267cf4d877f4c5f336ba4d52f203a5292
Acked-by: Chemin Hsieh <cheminh@qti.qualcomm.com>
Signed-off-by: Niranjana Vishwanathapura <nvishwan@codeaurora.org>