board: apq8084: Add AUX data of msm_sdcc.x for sdhc devices

This is required for Android boot scripts that expect the msm_sdcc.x
sysfs entries.

Change-Id: I829756c4dacabbc418c99e927525f560aa31fc3e
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Signed-off-by: Krishna Konda <kkonda@codeaurora.org>