drivers: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 24c62b8..7f138c6 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -382,7 +382,7 @@
 	spin_unlock_irqrestore(&gpio_lock, flags);
 	if (status)
 		pr_debug("%s: gpio-%d status %d\n",
-			__FUNCTION__, gpio, status);
+			__func__, gpio, status);
 	return status;
 }
 EXPORT_SYMBOL_GPL(gpio_direction_input);
@@ -420,7 +420,7 @@
 	spin_unlock_irqrestore(&gpio_lock, flags);
 	if (status)
 		pr_debug("%s: gpio-%d status %d\n",
-			__FUNCTION__, gpio, status);
+			__func__, gpio, status);
 	return status;
 }
 EXPORT_SYMBOL_GPL(gpio_direction_output);