drm/mediatek: dsi: Use symbolized register definition

For HSTX_CKLP_EN and DIS_EOT, use symbolized register
definition instead of magic number.
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

drivers/gpu/drm/mediatek/mtk_dsi.c

@@ -401,8 +401,11 @@ static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi)
 		break;
 	}
 
-	tmp_reg |= (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) << 6;
-	tmp_reg |= (dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET) >> 3;
+	if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
+		tmp_reg |= HSTX_CKLP_EN;
+
+	if (!(dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET))
+		tmp_reg |= DIS_EOT;
 
 	writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
 }