dtc: mkimage: Add the possibility to specify DTC

FreeBSD recently switch to it's BSDL dtc. While it support most of the
features of the GPL one it still lacks the incbin directive.
Add the possibility to specify which dtc we want to use for compiling dts
and generating fit image.

Signed-off-by: Emmanuel Vadot <manu@bidouilliste.com>
Acked-by: Simon Glass <sjg@chromium.org>

Makefile

@@ -349,7 +349,7 @@ OBJDUMP		= $(CROSS_COMPILE)objdump
 AWK		= awk
 PERL		= perl
 PYTHON		?= python
-DTC		= dtc
+DTC		?= dtc
 CHECK		= sparse
 
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \

tools/Makefile

@@ -175,6 +175,8 @@ HOSTCFLAGS_rsa-sign.o += -Wno-deprecated-declarations
 endif
 endif
 
+HOSTCFLAGS_fit_image.o += -DMKIMAGE_DTC=\"$(DTC)\"
+
 HOSTLOADLIBES_dumpimage := $(HOSTLOADLIBES_mkimage)
 HOSTLOADLIBES_fit_info := $(HOSTLOADLIBES_mkimage)
 HOSTLOADLIBES_fit_check_sign := $(HOSTLOADLIBES_mkimage)

tools/mkimage.h

@@ -44,6 +44,5 @@ static inline ulong map_to_sysmem(void *ptr)
 #define MKIMAGE_MAX_TMPFILE_LEN		256
 #define MKIMAGE_DEFAULT_DTC_OPTIONS	"-I dts -O dtb -p 500"
 #define MKIMAGE_MAX_DTC_CMDLINE_LEN	512
-#define MKIMAGE_DTC			"dtc"   /* assume dtc is in $PATH */
 
 #endif /* _MKIIMAGE_H_ */