wandboard: Remove unnecessary delay

There is no need to add a 100us delay after the DDR initialization.

Other imx6 boards do not have such delay either, so simply remove it.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

board/wandboard/spl.c

@@ -289,8 +289,6 @@ static void spl_dram_init(void)
 		mx6dq_dram_iocfg(64, &mx6dq_ddr_ioregs, &mx6dq_grp_ioregs);
 		mx6_dram_cfg(&mem_q, &mx6q_2g_mmdc_calib, &h5t04g63afr);
 	}
-
-	udelay(100);
 }
 
 void board_init_f(ulong dummy)