UPSTREAM: drm/amdgpu/ip_discovery: add missing ip_discovery fw

commit 2f6dd741 upstream.

Change-Id: Iad86f8bd48363bb51056ee3cfb4bf63d05387409
Signed-off-by: Flora Cui <flora.cui@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 04513cf1)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>