ARM: dts: msm: add sleep state for PCIe0 CLKREQ for sdxprairie

When PCIe0 core goes to D3, switch CLKREQ# to function 0
to prevent leakage on the external 10k pull-up for sdxprairie.

Change-Id: Ic2f10c64a32f2c1ee1692bde9a94e4ab66f36b21
Signed-off-by: Tony Truong <truong@codeaurora.org>