sunxi: Remove obsolete USBx_VBUS_PIN Kconfig symbols

Now that the USB PHY driver uses the device tree to get VBUS supply
regulators, these Kconfig symbols are unused. Remove them.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
87 files changed