drm/radeon: create radeon_asic.c

And move asic init plus a few related functions from radeon_device.c
to it. This file will hold all the asic structures in the future,
but atm they're still stuck in radeon_asic.h.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index b54d4f3..67f3c57 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -863,6 +863,12 @@
 	struct rv770_asic	rv770;
 };
 
+/*
+ * asic initizalization from radeon_asic.c
+ */
+void radeon_agp_disable(struct radeon_device *rdev);
+int radeon_asic_init(struct radeon_device *rdev);
+
 
 /*
  * IOCTL.