ARM: dts: msm: Change DT configuration for PMIC GPIO device

Couple of changes required to match with GPIO driver on msm-5.4 kernel
1. Compatible string should contain PMIC name
2. Need not explicitly list down all the PMIC GPIOs. It is provided as
   data in match table within the driver.

Change-Id: I1b661cffee893779d9233b76bf5cb15fbb19ebc3