Cleanup access to vendor/part # info

Instead of macros to access MAINBOARD record, use convenience functions.

Store pointers to MAINBOARD and HEADER for use outside of CB code.

Change-Id: I074e3a0df7d25726cbd942538bfdc5a63dd17e12
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Reviewed-on: http://review.coreboot.org/502
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

payloads/libpayload/arch/i386/coreboot.c

@@ -137,6 +137,8 @@ static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
 		     header->table_bytes) != header->table_checksum)
 		return -1;
 
+	info->header = header;
+
 	/* Now, walk the tables. */
 	ptr += header->header_bytes;
 
@@ -173,6 +175,9 @@ static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
 			cb_parse_framebuffer(ptr, info);
 			break;
 #endif
+		case CB_TAG_MAINBOARD:
+			info->mainboard = (struct cb_mainboard *)ptr;
+			break;
 		}
 
 		ptr += rec->size;