Keep BGX disabled for QEMU's EBB7304 target because native Octeon
Ethernet is not emulated.

Index: arch/mips/dts/mrvl,octeon-ebb7304.dts
--- arch/mips/dts/mrvl,octeon-ebb7304.dts.orig
+++ arch/mips/dts/mrvl,octeon-ebb7304.dts
@@ -235,7 +235,6 @@
 
 /* BGX 0 */
 &bgx0 {
-	status = "okay";
 	phy-handle = <&phy01208>; /* put phy-handle in BGX node and MAC node */
 
 	/* SerDes 0, may differ from PCS Lane/LMAC */
