AT91 fixes for 6.9

It contains:
- fixes for regulator nodes on SAMA7G5 based boards: proper DT property is used
  to setup regulators suspend voltage.
-----BEGIN PGP SIGNATURE-----

iHUEABYIAB0WIQTsZ8eserC1pmhwqDmejrg/N2X7/QUCZiUH3gAKCRCejrg/N2X7
/QsEAP40eTCcZeg+9LFjNAUh4b68vTrl5vJC4iggljPsP7mbFwEA/R4r5J4PBE8f
pWvfIOEVToP3zSmnlIW8r8PhpgUlTQ0=
=p0wV
-----END PGP SIGNATURE-----