lib/edid: Save the display ASCII string

Change-Id: Ic31af53dcb9947e2264c809ee8f80ea4f89f347d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/19499
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/include/edid.h

@@ -53,6 +53,8 @@ struct edid_mode {
  * unsigned int. We can move more into into this struct as needed.
  */
 
+#define EDID_ASCII_STRING_LENGTH 13
+
 struct edid {
 	/* These next three things used to all be called bpp.
 	 * Merriment ensued. The identifier
@@ -89,6 +91,7 @@ struct edid {
 	u32 bytes_per_line;
 
 	int hdmi_monitor_detected;
+	char ascii_string[EDID_ASCII_STRING_LENGTH + 1];
 };
 
 enum edid_status {