OMAP2PLUS: DSS2: Make members of dss_clk_source generic

The enum members of 'dss_clk_source' have clock source names specific to
OMAP2/3. Change the names to more generic terms such that they now describe
where the clocks come from and what they are used for.

Also, change the enum member names to have "DSS_CLK_SRC" instead of "DSS_SRC"
for more clarity.

Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c
index 026702b..1b2867d 100644
--- a/drivers/video/omap2/dss/dpi.c
+++ b/drivers/video/omap2/dss/dpi.c
@@ -57,7 +57,7 @@
 	if (r)
 		return r;
 
-	dss_select_dispc_clk_source(DSS_SRC_DSI1_PLL_FCLK);
+	dss_select_dispc_clk_source(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC);
 
 	r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
 	if (r)
@@ -217,7 +217,7 @@
 	dssdev->manager->disable(dssdev->manager);
 
 #ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
-	dss_select_dispc_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
+	dss_select_dispc_clk_source(DSS_CLK_SRC_FCK);
 	dsi_pll_uninit();
 	dss_clk_disable(DSS_CLK_SYSCK);
 #endif