dma-buf: Remove the signaled bit status check

Remove the signaled bit status check because it is returning
early when the fence is already signaled and
__dma_fence_enable_signaling is checking the status of signaled
bit again.

Signed-off-by: Arvind Yadav <Arvind.Yadav@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220914164321.2156-2-Arvind.Yadav@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>

drivers/dma-buf/dma-fence.c

@@ -601,9 +601,6 @@ void dma_fence_enable_sw_signaling(struct dma_fence *fence)
 {
 	unsigned long flags;
 
-	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
-		return;
-
 	spin_lock_irqsave(fence->lock, flags);
 	__dma_fence_enable_signaling(fence);
 	spin_unlock_irqrestore(fence->lock, flags);