Staging: workaround build system bug

This is needed as CONFIG_STAGING is set to y, yet there is no code in
drivers/staging/ to build, so the build-in.o doesn't get created
properly.  Create a "dummy" module in drivers/staging called staging.c
to work around this bug.

Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/staging.c

diff --git a/drivers/staging/staging.c b/drivers/staging/staging.c
new file mode 100644
index 0000000..233e589
--- /dev/null
+++ b/drivers/staging/staging.c
@@ -0,0 +1,19 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+static int __init staging_init(void)
+{
+	return 0;
+}
+
+static void __exit staging_exit(void)
+{
+}
+
+module_init(staging_init);
+module_exit(staging_exit);
+
+MODULE_AUTHOR("Greg Kroah-Hartman");
+MODULE_DESCRIPTION("Staging Core");
+MODULE_LICENSE("GPL");