usb: Update USB_STORAGE dependencies

As it's no longer possible to have !DM_USB set, we can remove these
dependencies.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 1657c2c..f0f7ace 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -1347,7 +1347,7 @@
 
 config SPL_USB_STORAGE
 	bool "Support loading from USB"
-	depends on SPL_USB_HOST && !(BLK && !DM_USB)
+	depends on SPL_USB_HOST
 	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.