net: phy: dp83869: Remove unneeded semicolon

Fixes coccicheck warning:

drivers/net/phy/dp83869.c:337:2-3: Unneeded semicolon

Reported-by: Hulk Robot <[e-mail]>
Signed-off-by: zhengbin <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/phy/dp83869.c

···
 		break;
 	default:
 		return -EINVAL;
-	};
+	}
 
 	return ret;
 }