ARM: dts: Set the high bank bit value for MSMcobalt

Set the recommended high bit bank value for A540 that
will be programmed into registers by the kernel and/or the
user mode driver.

CRs-Fixed: 994759
Change-Id: Ib3006067e184bf97adf75971ab96b2c673909eba
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>