drm/rockchip: refine the 4k30hz phy_config

Due to this config been modifed unexpected,
this patch correct it.

can refer commit f035091

Change-Id: Ic049f8af0b82f9f728b4c44d84ee6afa5cc5290a

Author: ck_zhang

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

@@ -167,7 +167,7 @@ static const struct dw_hdmi_phy_config rockchip_phy_config[] = {
 	/*pixelclk   symbol   term   vlev*/
 	{ 74250000,  0x8009, 0x0004, 0x0272},
 	{ 165000000, 0x802b, 0x0004, 0x0209},
-	{ 297000000, 0x8039, 0x0000, 0x0149},
+	{ 297000000, 0x802d, 0x0001, 0x0149},
 	{ ~0UL,	     0x0000, 0x0000, 0x0000}
 };