drm/i915/dp: Remove redundant sleep after AUX transaction length check.

The core already takes care of the delay before retrying. The delay now
changes to (500, 600)us instead of (500 + 1000, 600 + 1500)us.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180223221520.18464-5-dhinakaran.pandiyan@intel.com

drivers/gpu/drm/i915/intel_dp.c

@@ -1205,14 +1205,6 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
 	if (recv_bytes == 0 || recv_bytes > 20) {
 		DRM_DEBUG_KMS("Forbidden recv_bytes = %d on aux transaction\n",
 			      recv_bytes);
-		/*
-		 * FIXME: This patch was created on top of a series that
-		 * organize the retries at drm level. There EBUSY should
-		 * also take care for 1ms wait before retrying.
-		 * That aux retries re-org is still needed and after that is
-		 * merged we remove this sleep from here.
-		 */
-		usleep_range(1000, 1500);
 		ret = -EBUSY;
 		goto out;
 	}