arm: dts: spear13xx: Remove unused and undocumented "pl022,slave-tx-disable" property

Remove "pl022,slave-tx-disable" property which is both unused in the kernel
and undocumented. Most likely they are leftovers from downstream.

Signed-off-by: Rob Herring (Arm) <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

Author: robherring

arch/arm/boot/dts/st/spear1310-evb.dts

@@ -353,7 +353,6 @@
 					spi-max-frequency = <1000000>;
 					spi-cpha;
 					pl022,interface = <0>;
-					pl022,slave-tx-disable;
 					pl022,com-mode = <0>;
 					pl022,rx-level-trig = <0>;
 					pl022,tx-level-trig = <0>;
@@ -385,7 +384,6 @@
 					spi-cpol;
 					spi-cpha;
 					pl022,interface = <0>;
-					pl022,slave-tx-disable;
 					pl022,com-mode = <0x2>;
 					pl022,rx-level-trig = <0>;
 					pl022,tx-level-trig = <0>;

arch/arm/boot/dts/st/spear1340-evb.dts

@@ -446,7 +446,6 @@
 					spi-cpol;
 					spi-cpha;
 					pl022,interface = <0>;
-					pl022,slave-tx-disable;
 					pl022,com-mode = <0x2>;
 					pl022,rx-level-trig = <0>;
 					pl022,tx-level-trig = <0>;
@@ -461,7 +460,6 @@
 					spi-cpha;
 					reg = <1>;
 					pl022,interface = <0>;
-					pl022,slave-tx-disable;
 					pl022,com-mode = <0>;
 					pl022,rx-level-trig = <0>;
 					pl022,tx-level-trig = <0>;