vf610: ddrmc: add missing include

The DDR memory controller include file for the Vybrid uses
iomux_v3_cfg_t without actually including iomux-vf610.h.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
diff --git a/arch/arm/include/asm/arch-vf610/ddrmc-vf610.h b/arch/arm/include/asm/arch-vf610/ddrmc-vf610.h
index c7da2b8..03e3cec 100644
--- a/arch/arm/include/asm/arch-vf610/ddrmc-vf610.h
+++ b/arch/arm/include/asm/arch-vf610/ddrmc-vf610.h
@@ -10,6 +10,8 @@
 #ifndef __ASM_ARCH_VF610_DDRMC_H
 #define __ASM_ARCH_VF610_DDRMC_H
 
+#include <asm/arch/iomux-vf610.h>
+
 struct ddr3_jedec_timings {
 	u8 tinit;
 	u32 trst_pwron;