Revert "Makefile: Drop SPL_FIT_GENERATOR / SPL_FIT_SOURCE support" changes

:hile we had hoped to be able to remove these options finally, it was
missed that zynq still requires these currently.

This reverts commit 5b9261fb0b1ed087387f2036d279fd3f4bb20a61 and
commit 099b6df556c95f5d06864612e9199eab7ba50ed3.

Reported-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/boot/Kconfig b/boot/Kconfig
index 4314227..925afe0 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -282,6 +282,29 @@
 	  injected into the FIT creation (i.e. the blobs would have been pre-
 	  processed before being added to the FIT image).
 
+config SPL_FIT_SOURCE
+	string ".its source file for U-Boot FIT image"
+	depends on SPL_FIT
+	help
+	  Specifies a (platform specific) FIT source file to generate the
+	  U-Boot FIT image. This could specify further image to load and/or
+	  execute.
+
+config USE_SPL_FIT_GENERATOR
+	bool "Use a script to generate the .its script"
+	depends on SPL_FIT
+	default y if SPL_FIT && ARCH_ZYNQMP
+
+config SPL_FIT_GENERATOR
+	string ".its file generator script for U-Boot FIT image"
+	depends on USE_SPL_FIT_GENERATOR
+	default "arch/arm/mach-zynqmp/mkimage_fit_atf.sh" if SPL_LOAD_FIT && ARCH_ZYNQMP
+	help
+	  Specifies a (platform specific) script file to generate the FIT
+	  source file used to build the U-Boot FIT image file. This gets
+	  passed a list of supported device tree file stub names to
+	  include in the generated image.
+
 if VPL
 
 config VPL_FIT