imx: woodburn: Remove reference to gdata

The global_data pointer (gd) has already been set before board_init_f()
is called. We should not assign it again. We should also not use gdata since
it is going away.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Stefano Babic <sbabic@denx.de>

board/woodburn/woodburn.c

@@ -137,9 +137,6 @@ void board_init_f(ulong dummy)
 	/* Clear the BSS. */
 	memset(__bss_start, 0, __bss_end - __bss_start);
 
-	/* Set global data pointer. */
-	gd = &gdata;
-
 	preloader_console_init();
 	timer_init();