regulator: devres: Use enum regulator_get_type in internal functions

regulator: devres: Use enum regulator_get_type in internal functions

The enum regulator_get_type has been available since 2017, so use that
enum instead of an "untyped" int in the three functions where "get_type"
is used.

No functional change intended.

Suggested-by: Griffin Kroah-Hartman <griffin.kroah@fairphone.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://patch.msgid.link/20260330-regulator-devres-type-v1-1-d2c244576845@fairphone.com
Signed-off-by: Mark Brown <broonie@kernel.org>