[patch -next] i915: remove unneeded null checks

[Dan Carpenter <error27@gmail.com>]

The "encoder" variable can never be null because it is used as loop
cursor in a list_for_each_entry() loop.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index f6299bb..950dc8d 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -576,7 +576,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 		struct intel_encoder *intel_encoder;
 		struct intel_dp_priv *dp_priv;
 
-		if (!encoder || encoder->crtc != crtc)
+		if (encoder->crtc != crtc)
 			continue;
 
 		intel_encoder = enc_to_intel_encoder(encoder);
@@ -1352,7 +1352,7 @@ intel_trans_dp_port_sel (struct drm_crtc *crtc)
 	struct intel_encoder *intel_encoder = NULL;
 
 	list_for_each_entry(encoder, &mode_config->encoder_list, head) {
-		if (!encoder || encoder->crtc != crtc)
+		if (encoder->crtc != crtc)
 			continue;
 
 		intel_encoder = enc_to_intel_encoder(encoder);

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