Staging: comedi: amplc_pc236: Corrected documentation.

Interrupt is triggered by rising edge on port C bit 3 (not bit 7).

From: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/amplc_pc236.c

@@ -27,7 +27,7 @@ Driver: amplc_pc236
 Description: Amplicon PC36AT, PCI236
 Author: Ian Abbott <abbotti@mev.co.uk>
 Devices: [Amplicon] PC36AT (pc36at), PCI236 (pci236 or amplc_pc236)
-Updated: Wed, 22 Oct 2008 13:40:03 +0100
+Updated: Wed, 01 Apr 2009 15:41:25 +0100
 Status: works
 
 Configuration options - PC36AT:
@@ -45,7 +45,7 @@ as subdevice 0.
 
 Subdevice 1 pretends to be a digital input device, but it always returns
 0 when read. However, if you run a command with scan_begin_src=TRIG_EXT,
-a rising edge on port C bit 7 acts as an external trigger, which can be
+a rising edge on port C bit 3 acts as an external trigger, which can be
 used to wake up tasks.  This is like the comedi_parport device, but the
 only way to physically disable the interrupt on the PC36AT is to remove
 the IRQ jumper.  If no interrupt is connected, then subdevice 1 is