boards: beagle: beagleplay_cc1352p7: Disable 2.4g ieee802154

- A lot of zephyr networking samples (zperf, http_server, etc) will
  complain if both 2.4g and subg ieee802154 are enabled simultaneously.
- This leads to a lot of new people getting confused with the network code
  not working without any clear errors.
- As we already set the alias `zephyr,ieee802154 = &ieee802154g`, I think
  it would be best to enable only subg by default.

Signed-off-by: Ayush Singh <ayush@beagleboard.org>

Author: Ayush1325

boards/beagle/beagleplay/beagleplay_cc1352p7.dts

@@ -87,7 +87,7 @@
 };
 
 &ieee802154 {
-	status = "okay";
+	status = "disabled";
 };
 
 &ieee802154g {