Staging: hv: remove function pointer typedefs from vmbus.h

It's amazing the hoops that people go through to make code work
when they don't opensource the whole thing.  Passing these types
of function pointers around for no good reason is a mess, this needs
to be unwound as everything is now in the open.

Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index 70f66cb..3192d50 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -559,7 +559,7 @@
 	return;
 }
 
-static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
+static int netvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
 {
 	struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj;
 	struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
@@ -574,7 +574,7 @@
 	net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback;
 
 	/* Callback to client driver to complete the initialization */
-	pfn_drv_init(&net_drv_obj->Base);
+	drv_init(&net_drv_obj->Base);
 
 	drv_ctx->driver.name = net_drv_obj->Base.name;
 	memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType,