Drivers: hv: Change the signature for hv_signal_event()

In preparation for implementing a per-connection signaling framework,
change the signature of the function hv_signal_event(). The current
code uses a global handle for signaling the host.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 70ea5d1..3f8ce7b 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -402,5 +402,5 @@
 		(unsigned long *)vmbus_connection.send_int_page +
 		(child_relid >> 5));
 
-	return hv_signal_event();
+	return hv_signal_event(hv_context.signal_event_param);
 }