ARM: dts: Switch to SDHC by default for apq8084

Disable the SDCC devices and enable the SDHC devices to switch to SDHCI
driver by default.

Change-Id: Ic59c889abf5093926742c824bc65c2cb88ccf877
Signed-off-by: Krishna Konda <kkonda@codeaurora.org>
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>