ARM: dts: msm: Add qcom,cti-save property for MSM8953

Direct accessing to the CPU-CTI register causes the device
to breakdown when the cpu enters a low power mode,it is necessary
to verify whether the cpu enter low power mode. This function of
cti_cpu_verify_access is used for verification, this function
 work normally depend on "qcom,cti-save",so add this property.

Change-Id: Ibb24ddf750013fe3fa2c2cce6e4bd2d68548ae58
Signed-off-by: Yuanfang Zhang <zhangyuanfang@codeaurora.org>