drm/mediatek: dp: Remove unused register definitions

Some definitions in mtk_dp_reg.h are not used, so remove these
redundant codes.
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220916133821.27980-3-rex-bc.chen@mediatek.com

drivers/gpu/drm/mediatek/mtk_dp_reg.h

@@ -153,8 +153,6 @@
 #define CH_STATUS_1_DP_ENC0_P0_MASK			GENMASK(15, 0)
 #define MTK_DP_ENC0_P0_3094			0x3094
 #define CH_STATUS_2_DP_ENC0_P0_MASK			GENMASK(7, 0)
-#define MTK_DP_ENC0_P0_30A0			0x30a0
-#define DP_ENC0_30A0_MASK				(BIT(7) | BIT(8) | BIT(12))
 #define MTK_DP_ENC0_P0_30A4			0x30a4
 #define AU_TS_CFG_DP_ENC0_P0_MASK			GENMASK(7, 0)
 #define MTK_DP_ENC0_P0_30A8			0x30a8
@@ -171,8 +169,6 @@
 #define MTK_DP_ENC0_P0_312C			0x312c
 #define ASP_HB2_DP_ENC0_P0_MASK				GENMASK(7, 0)
 #define ASP_HB3_DP_ENC0_P0_MASK				GENMASK(15, 8)
-#define MTK_DP_ENC0_P0_3130			0x3130
-#define MTK_DP_ENC0_P0_3138			0x3138
 #define MTK_DP_ENC0_P0_3154			0x3154
 #define PGEN_HTOTAL_DP_ENC0_P0_MASK			GENMASK(13, 0)
 #define MTK_DP_ENC0_P0_3158			0x3158
@@ -206,8 +202,6 @@
 #define SDP_PACKET_TYPE_DP_ENC1_P0_MASK			GENMASK(4, 0)
 #define SDP_PACKET_W_DP_ENC1_P0				BIT(5)
 #define SDP_PACKET_W_DP_ENC1_P0_MASK			BIT(5)
-#define MTK_DP_ENC1_P0_328C			0x328c
-#define VSC_DATA_RDY_VESA_DP_ENC1_P0_MASK		BIT(7)
 #define MTK_DP_ENC1_P0_3300			0x3300
 #define VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL		2
 #define VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK		GENMASK(9, 8)