arm64: dts: rockchip: rename vcc5v0_usb30_host regulator for Cool Pi CM5 EVB

According to the schematic, USB20 HOST0 and HOST1 each have their own
independent power supply, but these two regulators controlled by a
same GPIO, so give it a more appropriate name.

Fixes: 791c154c

 ("arm64: dts: rockchip: Add support for rk3588 based board Cool Pi CM5 EVB")
Signed-off-by: Andy Yan <andyshrk@163.com>
Reviewed-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/20240201121106.1471301-3-andyshrk@163.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>