driver core: replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 1a06c23..4fbb56b 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -195,7 +195,7 @@
 		}
 	} else {
 		err = -EINVAL;
-		printk(KERN_ERR "%s: invalid device class\n", __FUNCTION__);
+		printk(KERN_ERR "%s: invalid device class\n", __func__);
 		WARN_ON(1);
 	}
 	mutex_unlock(&sysdev_drivers_lock);