ihs_mdio: Use new regmap interface

For the DM case, use the proper parameter for the regmap_init_mem call
(which is the ofnode, not the udevice).

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/gdsys/common/ihs_mdio.c b/board/gdsys/common/ihs_mdio.c
index b17e8db..f160a57 100644
--- a/board/gdsys/common/ihs_mdio.c
+++ b/board/gdsys/common/ihs_mdio.c
@@ -11,6 +11,7 @@
 #include <gdsys_fpga.h>
 #else
 #include <fdtdec.h>
+#include <dm.h>
 #include <regmap.h>
 #endif
 
@@ -28,7 +29,7 @@
 	struct regmap *map;
 	u8 *ptr;
 
-	regmap_init_mem(fpga, &map);
+	regmap_init_mem(dev_ofnode(fpga), &map);
 	ptr = regmap_get_range(map, 0);
 
 	return in_le16((u16 *)(ptr + base + addr));
@@ -40,7 +41,7 @@
 	struct regmap *map;
 	u8 *ptr;
 
-	regmap_init_mem(fpga, &map);
+	regmap_init_mem(dev_ofnode(fpga), &map);
 	ptr = regmap_get_range(map, 0);
 
 	out_le16((u16 *)(ptr + base + addr), val);