msm: pcie: Reduce the retry times for PCIe PHY

The reference clock stabilization delay has been added into PCIe
bus driver. Thus, the amount of retries before PCIe PHY is ready
should be reduced. Otherwise, the system bootup will be waiting
there for a very long time if PCIe PHY fails to be ready.

Change-Id: I6a8c33e18bf403a4ab4aae471b2e1b39f846fe51
Signed-off-by: Yan He <yanhe@codeaurora.org>