msm: pcie: remove read to PCIe ELBI_SYS_CTRL reg after PME_TURNOFF
After sending PME_TURNOFF message via ELBI_SYS_CTRL register,
remove read back to the register to avoid possible hang.
Change-Id: Ie424006991f10f12127f9b5a07a93c291c7a2f10
Signed-off-by:
Tony Truong <truong@codeaurora.org>
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