ARM: dts: msm: Modify SMB1390 driver for sm6150 target

For PM6150 based target, it's required to use SMB1390 power supply
framework based driver. Hence, modify SMB1390 compatible string to
select the alternate driver.

Change-Id: I189497ddfad53932b633e8a7232d01b13894d333
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>