regulator: pf0900: Add PMIC PF0900 support

regulator: pf0900: Add PMIC PF0900 support

The PF0900 is a power management integrated circuit (PMIC) optimized
for high performance i.MX9x based applications. It features five high
efficiency buck converters, three linear and one vaon regulators. It
provides low quiescent current in Standby and low power off Modes.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202507221720.jxsGRfcE-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202506181134.0Hkvy7CK-lkp@intel.com/
Signed-off-by: Joy Zou <joy.zou@nxp.com>
Link: https://patch.msgid.link/20250731-b4-pf09-v2-v3-2-4c2659516582@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>