Remove the function radeon_doorbell_free() that is not used anywhere.

This was partially found by using a static code analysis program called 
cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist at spectrumdigital.se>
---
 drivers/gpu/drm/radeon/radeon.h        |    1 -
 drivers/gpu/drm/radeon/radeon_device.c |   14 --------------
 2 files changed, 15 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index a9717b3..93e7cfc 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -700,7 +700,6 @@ struct radeon_doorbell {
 };

 int radeon_doorbell_get(struct radeon_device *rdev, u32 *page);
-void radeon_doorbell_free(struct radeon_device *rdev, u32 doorbell);

 /*
  * IRQS.
diff --git a/drivers/gpu/drm/radeon/radeon_device.c 
b/drivers/gpu/drm/radeon/radeon_device.c
index ea26769..16a9999 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -363,20 +363,6 @@ int radeon_doorbell_get(struct radeon_device *rdev, u32 
*doorbell)
        }
 }

-/**
- * radeon_doorbell_free - Free a doorbell entry
- *
- * @rdev: radeon_device pointer
- * @doorbell: doorbell index
- *
- * Free a doorbell allocated for use by the driver (all asics)
- */
-void radeon_doorbell_free(struct radeon_device *rdev, u32 doorbell)
-{
-       if (doorbell < rdev->doorbell.num_doorbells)
-               __clear_bit(doorbell, rdev->doorbell.used);
-}
-
 /*
  * radeon_wb_*()
  * Writeback is the the method by which the the GPU updates special pages
-- 
1.7.10.4

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