virtio/s390: keep early_put_chars

In case the registration of the hvc tty never happens AND the kernel
thinks that hvc0 is the preferred console we should keep the early
printk function to avoid a kernel panic due to code being removed.

Signed-off-by: Christian Borntraeger <[e-mail]>
Signed-off-by: Jing Liu <[e-mail]>
Signed-off-by: Cornelia Huck <[e-mail]>
Signed-off-by: Michael S. Tsirkin <[e-mail]>

drivers/s390/virtio/kvm_virtio.c

···
 }
 
 /* code for early console output with virtio_console */
-static __init int early_put_chars(u32 vtermno, const char *buf, int count)
+static int early_put_chars(u32 vtermno, const char *buf, int count)
 {
 	char scratch[17];
 	unsigned int len = count;