ARM: dts: msm: Add PMIC regulator devices for SDMSHRIKE

Add regulators for the SMPS, LDO and BOB regulators in the PM855
and PM855P PMIC chips used in SDMSHRIKE.

CRs-Fixed: 2209683
Change-Id: If1b5a378c15a1f63bc2062fc19128faa19880b72
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>