usb: gadget: mv_u3d: drop ARCH dependency

this driver compiles fine everywhere which
means we can use linux-next to compile it
for us frequently.

By dropping the arch dependency, we also
ensure driver writers don't add virtual
arch-depdencies to the driver by e.g. using
the wrong headers.

While at that, fix Marvell's USB3 PHY dependency,
that's the driver which depends on CPU_MM3, not
mv_u3d_core.
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/Kconfig

@@ -324,7 +324,6 @@ config USB_MV_UDC
 
 config USB_MV_U3D
 	tristate "MARVELL PXA2128 USB 3.0 controller"
-	depends on CPU_MMP3
 	help
 	  MARVELL PXA2128 Processor series include a super speed USB3.0 device
 	  controller, which support super speed USB peripheral.

drivers/usb/phy/Kconfig

@@ -45,7 +45,7 @@ config ISP1301_OMAP
 
 config MV_U3D_PHY
 	bool "Marvell USB 3.0 PHY controller Driver"
-	depends on USB_MV_U3D
+	depends on CPU_MMP3
 	help
 	  Enable this to support Marvell USB 3.0 phy controller for Marvell
 	  SoC.