libfdt: Fix 'make install' target handling of .h files.

The definition of LIBFDT_INCLUDES was accidentally dropped.
Put it back and add srcdir prefix handling for it.

Signed-off-by: Jon Loeliger <jdl@freescale.com>

Makefile

@@ -55,7 +55,7 @@ install: all
 	$(INSTALL) -d $(DESTDIR)$(LIBDIR)
 	$(INSTALL) -m 644 $(LIBFDT_lib) $(DESTDIR)$(LIBDIR)
 	$(INSTALL) -d $(DESTDIR)$(INCLUDEDIR)
-	$(INSTALL) -m 644 $(addprefix $(LIBFDT_srcdir)/,$(LIBFDT_INCLUDES)) $(DESTDIR)$(INCLUDEDIR)
+	$(INSTALL) -m 644 $(LIBFDT_include) $(DESTDIR)$(INCLUDEDIR)
 
 #
 # Rules for versioning
@@ -140,6 +140,8 @@ endif
 LIBFDT_objdir = libfdt
 LIBFDT_srcdir = libfdt
 LIBFDT_lib = $(LIBFDT_objdir)/libfdt.a
+LIBFDT_include = $(addprefix $(LIBFDT_srcdir)/,$(LIBFDT_INCLUDES))
+
 include $(LIBFDT_srcdir)/Makefile.libfdt
 
 .PHONY: libfdt

libfdt/Makefile.libfdt

@@ -3,5 +3,6 @@
 # This is not a complete Makefile of itself.  Instead, it is designed to
 # be easily embeddable into other systems of Makefiles.
 #
+LIBFDT_INCLUDES = fdt.h libfdt.h
 LIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c
 LIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)