OMAP2/3 clock: omap2_clk_enable(): fix logic

Rearrange the parent clock enable status check code so it actually makes
sense.  No functional change.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/clock.c

@@ -483,20 +483,23 @@ void omap2_clk_disable(struct clk *clk)
 
 int omap2_clk_enable(struct clk *clk)
 {
-	int ret = 0;
+	int ret;
 
 	if (++clk->usecount > 1)
 		return 0;
 
 	omap2_clkdm_clk_enable(clk->clkdm.ptr, clk);
 
-	if (clk->parent)
-		ret = omap2_clk_enable(clk->parent);
+	if (clk->parent) {
+		int parent_ret;
 
-	if (ret != 0) {
+		parent_ret = omap2_clk_enable(clk->parent);
+
+		if (parent_ret != 0) {
 			clk->usecount--;
 			omap2_clkdm_clk_disable(clk->clkdm.ptr, clk);
-		return ret;
+			return parent_ret;
+		}
 	}
 
 	ret = _omap2_clk_enable(clk);