ARM: dts: AM4372: Correct mailbox node data

The mailbox DT node for AM4372 is enabled and is corrected to
remove some properties that have crept in by mistake.

Fixes: 9e3269b8 (ARM: dts: AM4372: Add L2, EDMA, mailbox, MMC and SHAM nodes)
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am4372.dtsi

@@ -168,9 +168,6 @@ mailbox: mailbox@480C8000 {
 			ti,hwmods = "mailbox";
 			ti,mbox-num-users = <4>;
 			ti,mbox-num-fifos = <8>;
-			ti,mbox-names = "wkup_m3";
-			ti,mbox-data = <0 0 0 0>;
-			status = "disabled";
 		};
 
 		timer1: timer@44e31000 {