arm/dt: msm8974: add support for SD/eMMC bus speed modes

SDC1 supports following bus speed modes:
	- HS200 at 1.8V
	- DDR at 1.8V
SDC2 supports following bus speed modes:
	- SDR12, SDR25, SDR50, SDR104, DDR50

Change-Id: I648435fc00f6b11634cb3d0c41106ecb0868143f
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
4 files changed