xilinx: Fix xlnx,mio_bank property

s/xlnx,mio_bank/xlnx,mio-bank/g

DT binding is describing mio-bank not mio_bank that's why fix all DTSes and
also driver itself.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Peng Fan <peng.fan@nxp.com>

diff --git a/arch/arm/dts/zynqmp-topic-miamimp-xilinx-xdp-v1r1.dts b/arch/arm/dts/zynqmp-topic-miamimp-xilinx-xdp-v1r1.dts
index 0ee8c62..a377f27 100644
--- a/arch/arm/dts/zynqmp-topic-miamimp-xilinx-xdp-v1r1.dts
+++ b/arch/arm/dts/zynqmp-topic-miamimp-xilinx-xdp-v1r1.dts
@@ -97,13 +97,13 @@
 	non-removable;
 	disable-wp; /* We don't have a write-protect detection */
 	bus-width = <8>;
-	xlnx,mio_bank = <0>;
+	xlnx,mio-bank = <0>;
 };
 
 /* SD1 with level shifter */
 &sdhci1 {
 	status = "okay";
-	xlnx,mio_bank = <1>;
+	xlnx,mio-bank = <1>;
 	disable-wp; /* We don't have a write-protect detection */
 	bus-width = <4>;
 };