drm: Spelling s/sempahore/semaphore/

Fix misspellings of "semaphore".
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8b0542c12a2427f34a792c41ac2d2a2922874bfa.1689600102.git.geert+renesas@glider.be

drivers/gpu/drm/i915/i915_request.c

@@ -1220,7 +1220,7 @@ emit_semaphore_wait(struct i915_request *to,
 	/*
 	 * If this or its dependents are waiting on an external fence
 	 * that may fail catastrophically, then we want to avoid using
-	 * sempahores as they bypass the fence signaling metadata, and we
+	 * semaphores as they bypass the fence signaling metadata, and we
 	 * lose the fence->error propagation.
 	 */
 	if (from->sched.flags & I915_SCHED_HAS_EXTERNAL_CHAIN)

drivers/gpu/drm/radeon/cik.c

@@ -3603,7 +3603,7 @@ void cik_fence_compute_ring_emit(struct radeon_device *rdev,
  * @rdev: radeon_device pointer
  * @ring: radeon ring buffer object
  * @semaphore: radeon semaphore object
- * @emit_wait: Is this a sempahore wait?
+ * @emit_wait: Is this a semaphore wait?
  *
  * Emits a semaphore signal/wait packet to the CP ring and prevents the PFP
  * from running ahead of semaphore waits.

drivers/gpu/drm/radeon/r600.c

@@ -2918,7 +2918,7 @@ void r600_fence_ring_emit(struct radeon_device *rdev,
  * @rdev: radeon_device pointer
  * @ring: radeon ring buffer object
  * @semaphore: radeon semaphore object
- * @emit_wait: Is this a sempahore wait?
+ * @emit_wait: Is this a semaphore wait?
  *
  * Emits a semaphore signal/wait packet to the CP ring and prevents the PFP
  * from running ahead of semaphore waits.

include/drm/task_barrier.h

@@ -25,7 +25,7 @@
 
 /*
  * Reusable 2 PHASE task barrier (randevouz point) implementation for N tasks.
- * Based on the Little book of sempahores - https://greenteapress.com/wp/semaphores/
+ * Based on the Little book of semaphores - https://greenteapress.com/wp/semaphores/
  */