imx6ul: opos6ul: add SPL_DM support

Since commit commit 152038ea1886 ("i.MX6UL: icore: Add SPL_OF_CONTROL
support") the OPOS6UL board doesn't boot anymore. Adding SPL_DM support
makes the board boot again.

Fixes: commit 152038ea1886 ("i.MX6UL: icore: Add SPL_OF_CONTROL support")
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
diff --git a/board/armadeus/opos6uldev/board.c b/board/armadeus/opos6uldev/board.c
index 646094a..a830dc3 100644
--- a/board/armadeus/opos6uldev/board.c
+++ b/board/armadeus/opos6uldev/board.c
@@ -1,12 +1,11 @@
 /*
- * Copyright (C) 2017 Armadeus Systems
+ * Copyright (C) 2018 Armadeus Systems
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <asm/arch/clock.h>
 #include <asm/arch/mx6-pins.h>
-#include <asm/arch/opos6ul.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/gpio.h>
 #include <asm/mach-imx/iomux-v3.h>
@@ -106,20 +105,3 @@
 
 	return 0;
 }
-
-#ifdef CONFIG_SPL_BUILD
-#define UART_PAD_CTRL (						\
-	PAD_CTL_HYS | PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |	\
-	PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST			\
-)
-
-static iomux_v3_cfg_t const uart1_pads[] = {
-	MX6_PAD_UART1_TX_DATA__UART1_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
-	MX6_PAD_UART1_RX_DATA__UART1_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
-};
-
-void opos6ul_setup_uart_debug(void)
-{
-	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
-}
-#endif /* CONFIG_SPL_BUILD */