ARM: dts: msm: Add DT entries for SATA controller and PHY on MPQ8092

Add AHCI SATA controller and MSM SATA PHY nodes for MPQ8092.
This adds support for external SATA drives that are powered from
external power supply.

Change-Id: I988ec20498f0371f92137651740a67a99dffd040
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>