arm64: dts: ti: k3-am65-mcu Declare 8 bit TX capability for OSPI

Now that OSPI support 8D-8D-8D (8 bit DDR cmd-addr-data), declare 8 bit
TX capability in DT. While at that drop unused properties.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi

@@ -382,7 +382,6 @@
 			cdns,fifo-depth = <256>;
 			cdns,fifo-width = <4>;
 			cdns,trigger-address = <0x50000000>;
-			cdns,delay-elem-ps = <80>;
 			clocks = <&k3_clks 55 5>;
 			assigned-clocks = <&k3_clks 55 5>;
 			assigned-clock-parents = <&k3_clks 55 7>;

arch/arm64/boot/dts/ti/k3-am654-base-board.dts

@@ -499,7 +499,7 @@
 	flash@0{
 		compatible = "jedec,spi-nor";
 		reg = <0x0>;
-		spi-tx-bus-width = <1>;
+		spi-tx-bus-width = <8>;
 		spi-rx-bus-width = <8>;
 		spi-max-frequency = <50000000>;
 		spi-dqs;