arm64: zynqmp: Disable Tri-state for SDIO

Since the zynqmp pinctrl driver now includes support for the
tri-state registers, ensure that the pins needing output-enable
are correctly configured for SOMs.

Currently, there is an issue with the detection of the MMC for
the SOM kv260, resulting in the following error:
ZynqMP> mmc dev 1
Card did not respond to voltage select! : -110

To address this problem, configure the SDIO pins for output-enable
to enable MMC detection.
Signed-off-by: Tejas Bhumkar <tejas.arvind.bhumkar@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/540f83f7d88b80441c9fa3d771dd7b000b0710a4.1716802450.git.michal.simek@amd.com

arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso

@@ -321,6 +321,7 @@ conf {
 			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 			bias-disable;
+			output-enable;
 		};
 
 		conf-cd {

arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso

@@ -305,6 +305,7 @@ conf {
 			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 			bias-disable;
+			output-enable;
 		};
 
 		conf-cd {