msm: krypton: Enable PCIe with clock and board support

Add mapping for PCIe device so that PCIe driver can operate
on and manage the clocks for PCIe device. And add auxdata lookup
entries for PCIe in board file to match the device name with
clocks.

Change-Id: I9ad9945cb0469aaf0439e041c3b0b147824232c3
Signed-off-by: Yan He <yanhe@codeaurora.org>