Qualcomm pinctrl Devicetree bindings changes for v6.2
Big set of refactoring and improving Qualcomm pin controller bindings:
1. Convert several bindings from TXT to DT schema format: MDM9615,
MSM8974, MSM8994, MSM8996, MSM8998, SC7180, SDM630, SDM845, SM8150.
2. Refactor existing DT schema bindings to be consistent and similar to
each other, remove unneeded pieces (provided by common bindings) and
unify the style.
2. Fix matching of the existing DT schema bindings, so they properly
validate the DTS. When looking for pin configuration (children
nodes), be specific and expect "state" or "pins" suffixes (depending
on the nesting. This allows the schema later to properly parse also
GPIO hogs, although it is not yet implemented. The changes require
aligning the DTS to new layout, but it does not break any
compatibility.