ARM: dts: msm: Update cpubw table to acommodate upto 1.55 GHz DDR freq

The DDR frequency plan has changed. Update the table to accomodate older
and newer DDR frequency plans.

Change-Id: I5efdee2f33c54ec8df50701fc51c1ed6c8c1fb89
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>