nvramtool: Unify nvramtool and build_opt_tbl

As cmos.layout parsing capabilities are already there in nvramtool,
use those than using build_opt_tbl.c. Add binary and header file
generation in nvramtool. Make appropriate changes to Makefile.inc.

Change-Id: Iaf3f5d4f51451aeb33c92800a0c895045f2388cf
Signed-off-by: Vikram Narayanan <vikram186@gmail.com>
Reviewed-on: http://review.coreboot.org/898
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

util/nvramtool/cli/opts.h

@@ -48,7 +48,9 @@ typedef enum { NVRAMTOOL_OP_SHOW_VERSION = 0,
 	NVRAMTOOL_OP_WRITE_CMOS_DUMP,
 	NVRAMTOOL_OP_READ_CMOS_DUMP,
 	NVRAMTOOL_OP_SHOW_CMOS_HEX_DUMP,
-	NVRAMTOOL_OP_SHOW_CMOS_DUMPFILE
+	NVRAMTOOL_OP_SHOW_CMOS_DUMPFILE,
+	NVRAMTOOL_OP_WRITE_BINARY_FILE,
+	NVRAMTOOL_OP_WRITE_HEADER_FILE
 } nvramtool_op_t;
 
 typedef struct {