dtc: compile fdtget

We need fdtget in subsequent patches, so compile it.
Unfortunately this is not straight forward. fdtget needs libfdt,
but the Kernel Build System is not prepared for compiling
libraries for the host or binaries from files in multiple directories.
This patch moves the libfdt files to the dtc toplevel directory and
compiles fdtget as a binary from multiple source files but from
the same directory.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts/dtc/.gitignore

@@ -2,3 +2,4 @@ dtc
 dtc-lexer.lex.c
 dtc-parser.tab.c
 dtc-parser.tab.h
+fdtget

scripts/dtc/Makefile

@@ -1,15 +1,20 @@
 # scripts/dtc makefile
 
-hostprogs-y	:= dtc
+hostprogs-y	:= dtc fdtget
 always		:= $(hostprogs-y)
 
 dtc-objs	:= dtc.o flattree.o fstree.o data.o livetree.o treesource.o \
 		   srcpos.o checks.o util.o
 dtc-objs	+= dtc-lexer.lex.o dtc-parser.tab.o
 
+libfdt-objs	= fdt.o fdt_ro.o fdt_strerror.o fdt_wip.o
+libfdt-objs	+= fdt_empty_tree.o fdt_rw.o fdt_sw.o
+
+fdtget-objs	+= fdtget.o $(libfdt-objs) util.o
+
 # Source files need to get at the userspace version of libfdt_env.h to compile
 
-HOSTCFLAGS_DTC := -I$(src) -I$(src)/libfdt
+HOSTCFLAGS_DTC := -I$(src)
 
 HOSTCFLAGS_checks.o := $(HOSTCFLAGS_DTC)
 HOSTCFLAGS_data.o := $(HOSTCFLAGS_DTC)
@@ -21,6 +26,15 @@ HOSTCFLAGS_srcpos.o := $(HOSTCFLAGS_DTC)
 HOSTCFLAGS_treesource.o := $(HOSTCFLAGS_DTC)
 HOSTCFLAGS_util.o := $(HOSTCFLAGS_DTC)
 
+HOSTCFLAGS_fdt.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fdt_ro.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fdt_strerror.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fdt_wip.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fdt_empty_tree.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fdt_rw.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fdt_sw.o := $(HOSTCFLAGS_DTC)
+HOSTCFLAGS_fdtget.o := $(HOSTCFLAGS_DTC)
+
 HOSTCFLAGS_dtc-lexer.lex.o := $(HOSTCFLAGS_DTC)
 HOSTCFLAGS_dtc-parser.tab.o := $(HOSTCFLAGS_DTC)