drivers/tty: make hvc_console.c explicitly non-modular

The Kconfig currently controlling compilation of this code is:

drivers/tty/hvc/Kconfig:config HVC_DRIVER
drivers/tty/hvc/Kconfig:        bool

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only, even
though someone bothered to comment that the code was not used.

Unlike other changes, this driver binds in w/o using module_init,
so we dont have init ordering concerns with this commit.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/hvc/hvc_console.c

@@ -29,7 +29,7 @@
 #include <linux/kernel.h>
 #include <linux/kthread.h>
 #include <linux/list.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/major.h>
 #include <linux/atomic.h>
 #include <linux/sysrq.h>
@@ -1005,19 +1005,3 @@ put_tty:
 out:
 	return err;
 }
-
-/* This isn't particularly necessary due to this being a console driver
- * but it is nice to be thorough.
- */
-static void __exit hvc_exit(void)
-{
-	if (hvc_driver) {
-		kthread_stop(hvc_task);
-
-		tty_unregister_driver(hvc_driver);
-		/* return tty_struct instances allocated in hvc_init(). */
-		put_tty_driver(hvc_driver);
-		unregister_console(&hvc_console);
-	}
-}
-module_exit(hvc_exit);