drm/radeon/radeon_vm: Fix some function parameter documentation

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/radeon/radeon_vm.c:131: warning: Function parameter or member 'rdev' not described in 'radeon_vm_get_bos'
 drivers/gpu/drm/radeon/radeon_vm.c:643: warning: Excess function parameter 'start' description in 'radeon_vm_update_page_directory'
 drivers/gpu/drm/radeon/radeon_vm.c:643: warning: Excess function parameter 'end' description in 'radeon_vm_update_page_directory'
 drivers/gpu/drm/radeon/radeon_vm.c:819: warning: Function parameter or member 'ib' not described in 'radeon_vm_update_ptes'
 drivers/gpu/drm/radeon/radeon_vm.c:915: warning: Function parameter or member 'bo_va' not described in 'radeon_vm_bo_update'
 drivers/gpu/drm/radeon/radeon_vm.c:915: warning: Excess function parameter 'vm' description in 'radeon_vm_bo_update'
 drivers/gpu/drm/radeon/radeon_vm.c:915: warning: Excess function parameter 'bo' description in 'radeon_vm_bo_update'
 drivers/gpu/drm/radeon/radeon_vm.c:1155: warning: Excess function parameter 'vm' description in 'radeon_vm_bo_invalidate'

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_vm.c

@@ -119,6 +119,7 @@ void radeon_vm_manager_fini(struct radeon_device *rdev)
 /**
  * radeon_vm_get_bos - add the vm BOs to a validation list
  *
+ * @rdev: radeon_device pointer
  * @vm: vm providing the BOs
  * @head: head of validation list
  *
@@ -629,8 +630,6 @@ static uint32_t radeon_vm_page_flags(uint32_t flags)
  *
  * @rdev: radeon_device pointer
  * @vm: requested vm
- * @start: start of GPU address range
- * @end: end of GPU address range
  *
  * Allocates new page tables if necessary
  * and updates the page directory (cayman+).
@@ -802,6 +801,7 @@ static void radeon_vm_frag_ptes(struct radeon_device *rdev,
  *
  * @rdev: radeon_device pointer
  * @vm: requested vm
+ * @ib: indirect buffer to use for the update
  * @start: start of GPU address range
  * @end: end of GPU address range
  * @dst: destination address to map to
@@ -900,8 +900,7 @@ static void radeon_vm_fence_pts(struct radeon_vm *vm,
  * radeon_vm_bo_update - map a bo into the vm page table
  *
  * @rdev: radeon_device pointer
- * @vm: requested vm
- * @bo: radeon buffer object
+ * @bo_va: radeon buffer virtual address object
  * @mem: ttm mem
  *
  * Fill in the page table entries for @bo (cayman+).
@@ -1145,7 +1144,6 @@ void radeon_vm_bo_rmv(struct radeon_device *rdev,
  * radeon_vm_bo_invalidate - mark the bo as invalid
  *
  * @rdev: radeon_device pointer
- * @vm: requested vm
  * @bo: radeon buffer object
  *
  * Mark @bo as invalid (cayman+).