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/include/coreboot_tables.h

@@ -228,6 +228,16 @@ static inline u16 cb_checksum(const void *ptr, unsigned len)
 	return ipchksum(ptr, len);
 }
 
+static inline const char *cb_mb_vendor_string(const struct cb_mainboard *cbm)
+{
+	return (char *)(cbm->strings + cbm->vendor_idx);
+}
+
+static inline const char *cb_mb_part_string(const struct cb_mainboard *cbm)
+{
+	return (char *)(cbm->strings + cbm->part_number_idx);
+}
+
 /* Helpful macros */
 
 #define MEM_RANGE_COUNT(_rec) \
@@ -237,10 +247,4 @@ static inline u16 cb_checksum(const void *ptr, unsigned len)
 	(void *)(((u8 *) (_rec)) + sizeof(*(_rec)) \
 		+ (sizeof((_rec)->map[0]) * (_idx)))
 
-#define MB_VENDOR_STRING(_mb) \
-	(((unsigned char *) ((_mb)->strings)) + (_mb)->vendor_idx)
-
-#define MB_PART_STRING(_mb) \
-	(((unsigned char *) ((_mb)->strings)) + (_mb)->part_number_idx)
-
 #endif