board: apq8084: Add AUX data of msm_ufs.x for UFS devices

This is required for Android init scripts so as to pick the correct
boot device when a UFS device is used in place of or in addition to
an eMMC device.

Change-Id: I81c3ef9057a1e109846d2f6ad29a777c86cca0b8
Signed-off-by: Krishna Konda <kkonda@codeaurora.org>