udoo: Use checkboard() instead of show_board_info()

Boards can use a sysinfo driver if a particular model name is needed.
Update this board to use checkboard() directly, rather than having a
weak function laid on top of a weak function.

Signed-off-by: Simon Glass <sjg@chromium.org>

board/udoo/neo/neo.c

@@ -212,7 +212,7 @@ static char *board_string(int type)
 }
 
 /* Override the default implementation, DT model is not accurate */
-int show_board_info(void)
+int checkboard(void)
 {
 	int *board_type = (int *)OCRAM_START;