defconfig: sdm855: Enable MMC features for the SD Card

Enable the MMC's profiling, clock gating, deferred resume, and
ring buffer features for the SD card.

Change-Id: I108e74f24ed08d19eb50af4aa9d854dbc0a218d1
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>