of: Add missing space at end of pr_fmt().

Make pr_fmt() in fdt.c consistent with all other files in drivers/of/

Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>

drivers/of/fdt.c

@@ -9,7 +9,7 @@
  * version 2 as published by the Free Software Foundation.
  */
 
-#define pr_fmt(fmt)	"OF: fdt:" fmt
+#define pr_fmt(fmt)	"OF: fdt: " fmt
 
 #include <linux/crc32.h>
 #include <linux/kernel.h>