pinctrl: pinctrl-imx: only print debug message when DEBUG is defined

Fix regression for commit 3a86a5f8 (pinctrl: pinctrl-imx: free allocated
pinctrl_map structure only once and use kernel facilities for IMX_PMX_DUMP)
introduced in 3.5-rc3.
With above commit, the debug code will alway be excuted.
Change to excute it only when DEBUG is defined.

Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-imx.c b/drivers/pinctrl/pinctrl-imx.c
index dd6d93a..90c837f 100644
--- a/drivers/pinctrl/pinctrl-imx.c
+++ b/drivers/pinctrl/pinctrl-imx.c
@@ -474,7 +474,9 @@
 		grp->configs[j] = config & ~IMX_PAD_SION;
 	}
 
+#ifdef DEBUG
 	IMX_PMX_DUMP(info, grp->pins, grp->mux_mode, grp->configs, grp->npins);
+#endif
 
 	return 0;
 }