ARM: dts: msm: round down the util factor for msm8953

Round down the util factor from 1.538 to 1.53 as rounding
up to 1.54 leading to higher clock rates.

Change-Id: Ibeda3194ce674e620dff1722d49f7566fbdec89c
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>