drm/bridge: analogix_dp: squash lines for simple wrapper functions

Remove unneeded variables and assignments.
Reviewed-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
[seanpaul added analogix prefix to subject]
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1473863952-7658-4-git-send-email-yamada.masahiro@socionext.com

drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c

@@ -1073,34 +1073,22 @@ void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp,
 
 u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp)
 {
-	u32 reg;
-
-	reg = readl(dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
-	return reg;
+	return readl(dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
 }
 
 u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp)
 {
-	u32 reg;
-
-	reg = readl(dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
-	return reg;
+	return readl(dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
 }
 
 u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp)
 {
-	u32 reg;
-
-	reg = readl(dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
-	return reg;
+	return readl(dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
 }
 
 u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp)
 {
-	u32 reg;
-
-	reg = readl(dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
-	return reg;
+	return readl(dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
 }
 
 void analogix_dp_reset_macro(struct analogix_dp_device *dp)