drivers: regulator: core: use pr_fmt

This adds a pr_fmt line which uses the __func__ macro. I also
convert the current pr_ lines to remove their __func__ usage.

Cc: bleong@codeaurora.org
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

drivers/regulator/core.c

@@ -13,6 +13,8 @@
  *
  */
 
+#define pr_fmt(fmt) "%s:" fmt, __func__
+
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/device.h>
@@ -771,8 +773,8 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
 
 		/* else require explicit machine-level constraints */
 		if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
-			pr_err("%s: %s '%s' voltage constraints\n",
-				       __func__, "invalid", name);
+			pr_err("%s '%s' voltage constraints\n", "invalid",
+				name);
 			return -EINVAL;
 		}
 
@@ -793,21 +795,21 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
 
 		/* final: [min_uV..max_uV] valid iff constraints valid */
 		if (max_uV < min_uV) {
-			pr_err("%s: %s '%s' voltage constraints\n",
-				       __func__, "unsupportable", name);
+			pr_err("%s '%s' voltage constraints\n", "unsupportable",
+				name);
 			return -EINVAL;
 		}
 
 		/* use regulator's subset of machine constraints */
 		if (constraints->min_uV < min_uV) {
-			pr_debug("%s: override '%s' %s, %d -> %d\n",
-				       __func__, name, "min_uV",
+			pr_debug("override '%s' %s, %d -> %d\n",
+				 name, "min_uV",
 				 constraints->min_uV, min_uV);
 			constraints->min_uV = min_uV;
 		}
 		if (constraints->max_uV > max_uV) {
-			pr_debug("%s: override '%s' %s, %d -> %d\n",
-				       __func__, name, "max_uV",
+			pr_debug("override '%s' %s, %d -> %d\n",
+				 name, "max_uV",
 				 constraints->max_uV, max_uV);
 			constraints->max_uV = max_uV;
 		}