smbios: Correct logic in smbios_get_header()

This function skips over every second table. Fix it by dropping the
extra iterator update.

Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: a68c0625aa ("smbios: coreboot: Update smbios_get_header() to..")

lib/smbios-parser.c

@@ -71,8 +71,6 @@ const struct smbios_header *smbios_get_header(const struct smbios_info *info,
 	     header = smbios_next_table(info, header)) {
 		if (header->type == type)
 			return header;
-
-		header = smbios_next_table(info, header);
 	}
 
 	return NULL;