dt-bindings: phy: sun50i-a64: add a100 compatible

The USB PHY found in the A100 is similar to that found in the D1. Add a
compatible for the A100.

Signed-off-by: Cody Eksal <masterr3c0rd@epochal.quest>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Link: https://patch.msgid.link/20241031070232.1793078-4-masterr3c0rd@epochal.quest


Signed-off-by: Chen-Yu Tsai <wens@csie.org>