radxa zero: fix description for uart-ao-b-89

Signed-off-by: Nascs Fang <[email protected]>

arch/arm64/boot/dts/amlogic/overlays/meson-g12-uart-ao-b-89.dts

@@ -9,6 +9,6 @@
 		compatible = "radxa,zero", "radxa,zero2";
 		category = "misc";
 		exclusive = "uart_AO_B", "GPIOAO_8", "GPIOAO_9";
-		description = "Enable UART_AO-B on GPIOAO_8 and GPIOAO_9.\nOn Radxa Zero this is TX pin 35 & RX pin 37.\nOn Radxa Zero2 this is TX 33 & RX 37.\nOnly for use after zero 1.51 and requires radxa-zero-led-8-off to be enabled.";
+		description = "Enable UART_AO-B on GPIOAO_8 and GPIOAO_9.\nOn Radxa Zero this is TX pin 35 & RX pin 37.\nOn Radxa Zero2 this is TX 33 & RX 37.\nGPIOAO_8 need to be enabled for hardware version 1.51 and later.";
 	};
 };