dt-bindings: mfd: dlg,da9063: Add missing regulator patterns

Commit 5621d3977e29 ("dt-bindings: mfd: Add missing (unevaluated|
additional)Properties on child nodes") exposed a flaw in the original
binding, where "merged" versions of some regulators were missing,
leading to warnings on the HiFive Unmatched Devicetree.

Add the missing patterns (and merge some of the trivial ones).

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220916190009.2292223-1-conor@kernel.org