OMAP: DSS2: fix get_dsi/dispc_clk_source() usage

After changing the selection of DSI and DISPC clock source the users of
get_dsi/dispc_clk_source() functions were left unchanged.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 7781c65..212cb800 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -2198,7 +2198,7 @@
 {
 	unsigned long r = 0;
 
-	if (dss_get_dispc_clk_source() == 0)
+	if (dss_get_dispc_clk_source() == DSS_SRC_DSS1_ALWON_FCLK)
 		r = dss_clk_get_rate(DSS_CLK_FCK1);
 	else
 #ifdef CONFIG_OMAP2_DSS_DSI
@@ -2251,7 +2251,7 @@
 	seq_printf(s, "- DISPC -\n");
 
 	seq_printf(s, "dispc fclk source = %s\n",
-			dss_get_dispc_clk_source() == 0 ?
+			dss_get_dispc_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
 			"dss1_alwon_fclk" : "dsi1_pll_fclk");
 
 	seq_printf(s, "fck\t\t%-16lu\n", dispc_fclk_rate());