ARM: dts: msm: update bus bandwidth vote for msmcobalt ufs

The bandwidth vote determines the bus throughput needed for a
given running UFS gear frequency. For high throughput use cases
the current interface speed based votes may not be sufficient to
achieve peak user level throughput, as it doesn't count for other
system level latencies in the data path. Hence vote higher but
making sure the system stays in nominal voltage corner.

Change-Id: I95cda7e33288df7099826b37c2f436c5a33792e8
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>