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/Makefile b/common/Makefile
index ad390d0..8c92feb 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -75,8 +75,9 @@
 obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += fdt_support.o
 
 ifdef CONFIG_SPL_USB_HOST_SUPPORT
-obj-$(CONFIG_SPL_USB_SUPPORT) += usb.o usb_hub.o
-obj-$(CONFIG_USB_STORAGE) += usb_storage.o
+obj-y += usb.o
+obj-y += usb_hub.o
+obj-$(CONFIG_SPL_USB_STORAGE) += usb_storage.o
 else
 obj-$(CONFIG_USB_MUSB_HOST) += usb.o
 endif