usb: Rename SPL_USB_SUPPORT to SPL_USB_STORAGE

Since there is the SPL_USB_HOST_SUPPORT for enabling USB support in SPL,
makes more sense to rename the SPL_USB_SUPPORT as SPL_USB_STORAGE.
Everything that is not part of the usb storage support in SPL is now
build under SPL_USB_HOST_SUPPORT.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 935066d..85edd5a 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -794,9 +794,9 @@
 	  device can be attached. This option enables the drivers in
 	  drivers/usb/host as part of an SPL build.
 
-config SPL_USB_SUPPORT
+config SPL_USB_STORAGE
 	bool "Support loading from USB"
-	depends on SPL_USB_HOST_SUPPORT
+	depends on SPL_USB_HOST_SUPPORT && !(BLK && !DM_USB)
 	help
 	  Enable support for USB devices in SPL. This allows use of USB
 	  devices such as hard drives and flash drivers for loading U-Boot.