ARM: dts: msm: update mincpu BW vote when Big CPU runs at Max freq

Increase mincpu BW vote mapping for Big CPU Max frequency
to DDR Max frequency. This will help to reduce RAM access
latencies when CPU is running at max frequency.

Change-Id: I5f12ff09d5b2b94b1f02394219a3dcb4e56589e8
Signed-off-by: Sravan Kumar Ambapuram <asravan@codeaurora.org>