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>
diff --git a/util/nvramtool/accessors/layout-text.h b/util/nvramtool/accessors/layout-text.h
index 21997e9..85628f7 100644
--- a/util/nvramtool/accessors/layout-text.h
+++ b/util/nvramtool/accessors/layout-text.h
@@ -37,5 +37,8 @@
 void set_layout_filename(const char filename[]);
 void get_layout_from_file(void);
 void write_cmos_layout(FILE * f);
+void write_cmos_output_bin(const char *binary_filename);
+void write_cmos_layout_header(const char *header_filename);
+extern int is_ident(char *str);
 
 #endif				/* LAYOUT_FILE_H */