boot/uboot/Config.in: Fix BR2_TARGET_UBOOT_SPL_NAME

Point out that the SPL name is an image name.

Signed-off-by: Jörg Krause <jkrause@posteo.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

boot/uboot/Config.in

@@ -225,7 +225,7 @@ config BR2_TARGET_UBOOT_SPL
 	  into DDR.
 
 config BR2_TARGET_UBOOT_SPL_NAME
-	string "U-Boot SPL target name"
+	string "U-Boot SPL binary image name"
 	default "spl/u-boot-spl.bin"
 	depends on BR2_TARGET_UBOOT_SPL
 	help