Pull operating performance points (OPP) framework changes for v5.15
from Viresh Kumar:
"This moves the OPP bindings to DT schema (Rob Herring)."
* 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
dt-bindings: opp: Convert to DT schema
dt-bindings: Clean-up OPP binding node names in examples
ARM: dts: omap: Drop references to opp.txt