arm64: dts: rockchip: fix usb2phy nodename for rk3588

arm64: dts: rockchip: fix usb2phy nodename for rk3588

usb2-phy should be named usb2phy according to the DT binding,
so let's fix it up accordingly.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20240408225109.128953-5-sebastian.reichel@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[ upstream commit: 4e07a95f7402de092cd71b2cb96c69f85c98f251 ]

(cherry picked from commit 5a3e4638492497ae81b9bd4a8627f4727e312ccc)
Signed-off-by: Jianfeng Liu <liujianfeng1994@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>