drm: Remove old defines for vswing and pre-emph values

This is the last patch in the series, so remove old defines
Signed-off-by: NSonika Jindal <sonika.jindal@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

include/drm/drm_dp_helper.h

@@ -190,23 +190,15 @@
 # define DP_TRAIN_VOLTAGE_SWING_MASK	    0x3
 # define DP_TRAIN_VOLTAGE_SWING_SHIFT	    0
 # define DP_TRAIN_MAX_SWING_REACHED	    (1 << 2)
-# define DP_TRAIN_VOLTAGE_SWING_400	    (0 << 0)
 # define DP_TRAIN_VOLTAGE_SWING_LEVEL_0 (0 << 0)
-# define DP_TRAIN_VOLTAGE_SWING_600	    (1 << 0)
 # define DP_TRAIN_VOLTAGE_SWING_LEVEL_1 (1 << 0)
-# define DP_TRAIN_VOLTAGE_SWING_800	    (2 << 0)
 # define DP_TRAIN_VOLTAGE_SWING_LEVEL_2 (2 << 0)
-# define DP_TRAIN_VOLTAGE_SWING_1200	    (3 << 0)
 # define DP_TRAIN_VOLTAGE_SWING_LEVEL_3 (3 << 0)
 
 # define DP_TRAIN_PRE_EMPHASIS_MASK	    (3 << 3)
-# define DP_TRAIN_PRE_EMPHASIS_0	    (0 << 3)
 # define DP_TRAIN_PRE_EMPH_LEVEL_0		(0 << 3)
-# define DP_TRAIN_PRE_EMPHASIS_3_5	    (1 << 3)
 # define DP_TRAIN_PRE_EMPH_LEVEL_1		(1 << 3)
-# define DP_TRAIN_PRE_EMPHASIS_6	    (2 << 3)
 # define DP_TRAIN_PRE_EMPH_LEVEL_2		(2 << 3)
-# define DP_TRAIN_PRE_EMPHASIS_9_5	    (3 << 3)
 # define DP_TRAIN_PRE_EMPH_LEVEL_3		(3 << 3)
 
 # define DP_TRAIN_PRE_EMPHASIS_SHIFT	    3