usb: Kconfig: migrate USB_DWC2 to Kconfig

This change migrates the USB_DWC2 configuration item to Kconfig
and runs moveconfig to adjust header files and defconfig.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Split off into a separate patch:
Ran moveconfig to migrate other boards:
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/configs/socfpga_sockit_defconfig b/configs/socfpga_sockit_defconfig
index bf5d63d..864ec59 100644
--- a/configs/socfpga_sockit_defconfig
+++ b/configs/socfpga_sockit_defconfig
@@ -57,6 +57,7 @@
 CONFIG_DESIGNWARE_SPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
+CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DWC2_OTG=y