ARM: dts: msm: Update frequency to 1804.8MHz for MSM8953

Add new speed bin-6 and update the frequencies.
While at it, update the CPR configuration for speed-bin 6.

Change-Id: I2b5a4393024fec2ca4a0db171398494ee87b0fa3
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>