ACPI / hotplug: Simplify acpi_set_hp_context()

Since all of the acpi_set_hp_context() callers pass at least one NULL
function pointer and one caller passes NULL function pointers only
to it, drop function pointer arguments from acpi_set_hp_context()
and make the callers initialize the function pointers in struct
acpi_hotplug_context by themselves before passing it to
acpi_set_hp_context().

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

include/acpi/acpi_bus.h

@@ -372,15 +372,9 @@ static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
 }
 
 static inline void acpi_set_hp_context(struct acpi_device *adev,
-				       struct acpi_hotplug_context *hp,
-				       int (*notify)(struct acpi_device *, u32),
-				       void (*uevent)(struct acpi_device *, u32),
-				       void (*fixup)(struct acpi_device *))
+				       struct acpi_hotplug_context *hp)
 {
 	hp->self = adev;
-	hp->notify = notify;
-	hp->uevent = uevent;
-	hp->fixup = fixup;
 	adev->hp = hp;
 }