drm/rockchip: remove hdmi 4k@50hz/60hz mode rate

Remove hdmi 4k@50hz/60hz till we pass VD
and EMI testing.

Change-Id: I259f50d6f4556bce90aaea266229095156397757

Author: ck_zhang

drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

@@ -353,7 +353,6 @@ static struct dw_hdmi_phy_config rockchip_phy_config[] = {
 	{ 74250000,  0x8009, 0x0004, 0x0272},
 	{ 165000000, 0x802b, 0x0004, 0x0209},
 	{ 297000000, 0x802d, 0x0001, 0x0149},
-	{ 594000000, 0x8039, 0x0000, 0x019d},
 	{ ~0UL,	     0x0000, 0x0000, 0x0000}
 };