regulator: qcom-rpmh: add support for pm7550 regulators

Add RPMH regulators exposed by Qualcomm Technologies, Inc. PM7550 PMIC.
It has 6 FTS525 (FT-SMPS) and 23 LDOs with 3 different types.
L1-L11 are LDO515 LV NMOS, L12-L13 are LDO515 MV PMOS, L14-L23 are
LDO512 MV PMOS.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://patch.msgid.link/20250711-pm7550-pmr735b-rpmh-regs-v2-4-bca8cc15c199@fairphone.com


Signed-off-by: Mark Brown <broonie@kernel.org>