video: Drop DEV_FLAGS_SYSTEM flag

DEV_FLAGS_SYSTEM does not have any actual meaning, hence drop it.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index bf972dc..3500047 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -330,7 +330,7 @@
 	memset(&dev, 0, sizeof(dev));
 
 	strcpy(dev.name, "nc");
-	dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
+	dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 	dev.start = nc_stdio_start;
 	dev.putc = nc_stdio_putc;
 	dev.puts = nc_stdio_puts;