regulator: spacemit-p1: Update supply names

regulator: spacemit-p1: Update supply names

Update supply names to match the P1 PMIC's actual hardware pinout where
each buck has an individual VIN pin (vin1-vin6) and LDO groups have
dedicated input pins (aldoin, dldoin1, dldoin2).

This is an ABI change from the original "vin" and "buck5" supplies.
The P1/PMIC regulator has no consumers in the DTS tree yet. For the two
K1 boards in-tree (BPI-F3 and Jupiter), power settings come from
boot firmware, so a probe failure has minimal impact.

Signed-off-by: Guodong Xu <guodong@riscstar.com>
Link: https://developer.spacemit.com/documentation?token=T1Btw2BdiiSlSXkAdibcoMetnag
[1]
Reviewed-by: Alex Elder <elder@riscstar.com>
Link: https://patch.msgid.link/20260206-spacemit-p1-v4-2-8f695d93811e@riscstar.com
Signed-off-by: Mark Brown <broonie@kernel.org>