imx: cm_fx6: 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: Igor Grinberg <grinberg@compulab.co.il>
Tested-by: Nikita Kiryanov <nikita@compulab.co.il>
Acked-by: Nikita Kiryanov <nikita@compulab.co.il>

board/compulab/cm_fx6/spl.c

@@ -313,7 +313,6 @@ void board_init_f(ulong dummy)
 {
 	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
 
-	gd = &gdata;
 	/*
 	 * We don't use DMA in SPL, but we do need it in U-Boot. U-Boot
 	 * initializes DMA very early (before all board code), so the only