usb: musb: Rework USB and USB_GADGET dependency

This USB controller can work in as host-only, gadget-only or dual-role
modes. Rework the dependency on the USB and USB_GADGET configs in order
to allow building the driver when !USB or !USG_GADGET.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/Kconfig

@@ -94,8 +94,6 @@ source "drivers/usb/wusbcore/Kconfig"
 
 source "drivers/usb/host/Kconfig"
 
-source "drivers/usb/musb/Kconfig"
-
 source "drivers/usb/renesas_usbhs/Kconfig"
 
 source "drivers/usb/class/Kconfig"
@@ -106,6 +104,8 @@ source "drivers/usb/image/Kconfig"
 
 endif
 
+source "drivers/usb/musb/Kconfig"
+
 source "drivers/usb/dwc3/Kconfig"
 
 source "drivers/usb/chipidea/Kconfig"

drivers/usb/musb/Kconfig

@@ -6,7 +6,7 @@
 # (M)HDRC = (Multipoint) Highspeed Dual-Role Controller
 config USB_MUSB_HDRC
 	tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, ...)'
-	depends on USB_GADGET
+	depends on (USB || USB_GADGET)
 	help
 	  Say Y here if your system has a dual role high speed USB
 	  controller based on the Mentor Graphics silicon IP.  Then
@@ -35,21 +35,21 @@ choice
 
 config USB_MUSB_HOST
 	bool "Host only mode"
-	depends on USB
+	depends on USB=y || USB=USB_MUSB_HDRC
 	help
 	  Select this when you want to use MUSB in host mode only,
 	  thereby the gadget feature will be regressed.
 
 config USB_MUSB_GADGET
 	bool "Gadget only mode"
-	depends on USB_GADGET
+	depends on USB_GADGET=y || USB_GADGET=USB_MUSB_HDRC
 	help
 	  Select this when you want to use MUSB in gadget mode only,
 	  thereby the host feature will be regressed.
 
 config USB_MUSB_DUAL_ROLE
 	bool "Dual Role mode"
-	depends on (USB && USB_GADGET)
+	depends on ((USB=y || USB=USB_MUSB_HDRC) && (USB_GADGET=y || USB_GADGET=USB_MUSB_HDRC))
 	help
 	  This is the default mode of working of MUSB controller where
 	  both host and gadget features are enabled.