spl: Kconfig: Drop the _SUPPORT postfix from SPL_DFU

The symbol CONFIG_SPL_DFU_SUPPORT in SPL build has the same
meaning as CONFIG_DFU in regular U-Boot. Drop the _SUPPORT
to allow for cleaner use in code.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Lukasz Majewski <lukma@denx.de>
diff --git a/common/Makefile b/common/Makefile
index 0de60b3..3711016 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -64,10 +64,10 @@
 obj-$(CONFIG_$(SPL_TPL_)BLOBLIST) += bloblist.o
 
 ifdef CONFIG_SPL_BUILD
-ifdef CONFIG_SPL_DFU_SUPPORT
+ifdef CONFIG_SPL_DFU
 obj-$(CONFIG_DFU_OVER_USB) += dfu.o
 endif
-obj-$(CONFIG_SPL_DFU_SUPPORT) += cli_hush.o
+obj-$(CONFIG_SPL_DFU) += cli_hush.o
 obj-$(CONFIG_SPL_HASH_SUPPORT) += hash.o
 obj-$(CONFIG_TPL_HASH_SUPPORT) += hash.o
 obj-$(CONFIG_SPL_YMODEM_SUPPORT) += xyzModem.o