ARM: dts: msm: revert PCIe0 SID change for sm8150-sdx50m

The SID allocated for sdx50m does not work with other endpoints.
Since it is uncommon for sdx50m to be connected to PCIe0, change
the SID assigned to PCIe0 to its previous value so other endpoints
can be connected.

Change-Id: I9b0193bf7d4026b0c4938caa18d60bd797fa80f2
Signed-off-by: Tony Truong <truong@codeaurora.org>