imx-usb-loader: remove - from prompt

The prompt of all host packages is "host foo", except for imx-usb-loader
that uses "host-foo", and more precisely "host-imx-usb loader", which is
really weird. This commit fixes this inconsistency.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/imx-usb-loader/Config.in.host

@@ -1,5 +1,5 @@
 config BR2_PACKAGE_HOST_IMX_USB_LOADER
-	bool "host-imx-usb loader"
+	bool "host imx-usb-loader"
 	depends on BR2_arm
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