Staging: line6: remove PT_REGS

As the code is in the kernel tree, it's no longer needed.

Cc: Markus Grabner <grabner@icg.tugraz.at>
Cc: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/line6/midi.c b/drivers/staging/line6/midi.c
index b6fea16..f726819 100644
--- a/drivers/staging/line6/midi.c
+++ b/drivers/staging/line6/midi.c
@@ -87,7 +87,7 @@
 /*
 	Notification of completion of MIDI transmission.
 */
-static void midi_sent(struct urb *urb PT_REGS)
+static void midi_sent(struct urb *urb)
 {
 	unsigned long flags;
 	int status;