OMAP4: DSS2: clocks: Add ick as dummy clock

DSS code uses ick as one of the clocks in clk_get/clk_put. OMAP4 clock database
doesn't have ick for DSS, so adding ick as dummy clock.

This is needed for backward compatibility with OMAP2/3.

Once pm_runtime* APIs get introduced in DSS, this will be revisited.
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

arch/arm/mach-omap2/clock44xx_data.c

@@ -3111,6 +3111,11 @@ static struct omap_clk omap44xx_clks[] = {
 	CLK("omapdss_dss",	"dss_clk",			&dss_dss_clk,	CK_443X),
 	CLK("omapdss_dss",	"video_clk",			&dss_48mhz_clk,	CK_443X),
 	CLK("omapdss_dss",	"fck",				&dss_fck,	CK_443X),
+	/*
+	 * On OMAP4, DSS ick is a dummy clock; this is needed for compatibility
+	 * with OMAP2/3.
+	 */
+	CLK("omapdss_dss",	"ick",				&dummy_ck,	CK_443X),
 	CLK(NULL,	"efuse_ctrl_cust_fck",		&efuse_ctrl_cust_fck,	CK_443X),
 	CLK(NULL,	"emif1_fck",			&emif1_fck,	CK_443X),
 	CLK(NULL,	"emif2_fck",			&emif2_fck,	CK_443X),