drm/amdgpu: drop unexpected word 'for' in comments

there is an unexpected word 'for' in the comments that need to be dropped

file - drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
line - 245

 * position and also advance the position for for Vega10

changed to:

 * position and also advance the position for Vega10
Signed-off-by: Jiang Jian <jiangjian@cdjrlc.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c

@@ -242,7 +242,7 @@ int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih)
  * @entry: IV entry
  *
  * Decodes the interrupt vector at the current rptr
- * position and also advance the position for for Vega10
+ * position and also advance the position for Vega10
  * and later GPUs.
  */
 void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev,