FDT: Fix DTC repository references

The Device Tree Compiler (DTC) used to have its master
repository located on jdl.com.  While it is still there,
its official, new, shiny location is on kernel.org here:

    git://git.kernel.org/pub/scm/utils/dtc/dtc.git

Update a few references to point there instead.

Signed-off-by: Jon Loeliger <jdl@jdl.com>
Acked-by: Simon Glass <sjg@chromium.org>

doc/README.fdt-control

@@ -66,11 +66,11 @@ Tools
 
 To use this feature you will need to get the device tree compiler here:
 
-	git://jdl.com/software/dtc.git
+	git://git.kernel.org/pub/scm/utils/dtc/dtc.git
 
 For example:
 
-	$ git clone git://jdl.com/software/dtc.git
+	$ git clone git://git.kernel.org/pub/scm/utils/dtc/dtc.git
 	$ cd dtc
 	$ make
 	$ sudo make install

doc/uImage.FIT/howto.txt

@@ -16,7 +16,10 @@ create an uImage in the new format: mkimage and dtc, although only one
 (mkimage) is invoked directly. dtc is called from within mkimage and operates
 behind the scenes, but needs to be present in the $PATH nevertheless. It is
 important that the dtc used has support for binary includes -- refer to
-www.jdl.com for its latest version. mkimage (together with dtc) takes as input
+
+	git://git.kernel.org/pub/scm/utils/dtc/dtc.git
+
+for its latest version. mkimage (together with dtc) takes as input
 an image source file, which describes the contents of the image and defines
 its various properties used during booting. By convention, image source file
 has the ".its" extension, also, the details of its format are given in