ARM: dts: msm: Update bimc bw table for mdmfermium

The bimc frequency plan has been updated. So change the
bw mapping in the cpubw table to reflect the same.

Change-Id: I880e963779f7c129c31fe7e0b9bfddf528c81e9b
Signed-off-by: Hanumath Prasad <hpprasad@codeaurora.org>