ARM: OMAP: Fix gpt2_ick clock bit

CM_ICLKEN1_CORE bit should be 4, not 0 as noted by
Richard Woodruff.
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/clock.h

@@ -1062,7 +1062,7 @@ static struct clk gpt2_ick = {
 	.parent		= &l4_ck,
 	.flags		= CLOCK_IN_OMAP242X | CLOCK_IN_OMAP243X,
 	.enable_reg	= (void __iomem *)&CM_ICLKEN1_CORE,	/* Bit4 */
-	.enable_bit	= 0,
+	.enable_bit	= 4,
 	.recalc		= &omap2_followparent_recalc,
 };