arm64: defconfig: Enable eMMC/SD card driver for holi QGKI defconfig

Enable eMMC/SD card driver as a inbuilt module for holi
QGKI defconfig.

Also Enable a config flag to add Qualcomm specific code to upstream
MMC drivers.

Change-Id: Ic98253109fe656ee78c95ae21290210305f5ec4b
Signed-off-by: Sarthak Garg <sartgarg@codeaurora.org>