phy: rockchip: fix Kconfig dependency more

A previous patch ensured that USB Type C connector support is enabled,
but it is still possible to build the phy driver without enabling
CONFIG_USB (host support) or CONFIG_USB_GADGET (device support), and
in that case the common helper functions are unavailable:

aarch64-linux-ld: drivers/phy/rockchip/phy-rockchip-usbdp.o: in function `rk_udphy_probe':
phy-rockchip-usbdp.c:(.text+0xe74): undefined reference to `usb_get_maximum_speed'

Select CONFIG_USB_COMMON directly here, like we do in some other phy
drivers, to make sure this is available even when actual USB support
is disabled or in a loadable module that cannot be reached from a
built-in phy driver.

Fixes: 9c79b779643e ("phy: rockchip: fix CONFIG_TYPEC dependency")
Signed-off-by: Arnd Bergmann <[e-mail]>
Reviewed-by: Sebastian Reichel <[e-mail]>
Reviewed-by: Heiko Stuebner <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/phy/rockchip/Kconfig

···
 	depends on ARCH_ROCKCHIP && OF
 	depends on TYPEC
 	select GENERIC_PHY
+	select USB_COMMON
 	help
 	  Enable this to support the Rockchip USB3.0/DP combo PHY with
 	  Samsung IP block. This is required for USB3 support on RK3588.