ARM: dts: keystone-k2l: fix mdio io start address

The K2L MDIO io space has different start address.
Hence, fix it to be 0x26200f00 according to TRM.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
diff --git a/arch/arm/boot/dts/k2l.dtsi b/arch/arm/boot/dts/k2l.dtsi
index 291db43..e32c3ba 100644
--- a/arch/arm/boot/dts/k2l.dtsi
+++ b/arch/arm/boot/dts/k2l.dtsi
@@ -95,3 +95,7 @@
        /* Pin muxed. Enabled and configured by Bootloader */
        status = "disabled";
 };
+
+&mdio {
+	reg = <0x26200f00 0x100>;
+};