ARM: dts: msm: enable SDHCI PM QoS for msm8996 for SD card

This enables both IRQ and cpu group voting for SD card.
Latency values are such that fast power-collapse will be avoided,
while wfi mode is enabled.

Change-Id: I0139d3eb790400fe42ca169dc778292d16bad861
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>