defconfig: sm8150: Enable QPNP_PBS driver

Enable QPNP_PBS driver to trigger PBS sequence for some PMIC
specific configuration on PM8150B that is used on SM8150
platforms.

Change-Id: Ib7a7853b8aeaba8b3663bc8f5f92f2367b577172
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>