staging: vme: tsi148: fix warning in free_irq

staging: vme: tsi148: fix warning in free_irq

The cookie passed to request_irq isn't the same as the one passed
to free_irq, which results in the following warning:

[   63.243533] WARNING: at kernel/irq/manage.c:899 __free_irq+0x9b/0x17d()
[   63.243533] Hardware name:
[   63.243533] Trying to free already-free IRQ 17
[   63.243533] Modules linked in: vme_tsi148(-) vme e1000e iTCO_wdt iTCO_vendor_support [last unloaded: scsi_wait_scan]
[   63.243533] Pid: 2013, comm: rmmod Not tainted 2.6.35 #2
[   63.243533] Call Trace:
[   63.243533]  [<ffffffff81036ea3>] warn_slowpath_common+0x80/0x98
[   63.243533]  [<ffffffff81036f4f>] warn_slowpath_fmt+0x41/0x43
[   63.243533]  [<ffffffff810678c4>] __free_irq+0x9b/0x17d
[   63.243533]  [<ffffffff810679d9>] free_irq+0x33/0x4e
[   63.243533]  [<ffffffffa004a897>] tsi148_irq_exit+0x6b/0x70 [vme_tsi148]
[...]
[   63.243533] ---[ end trace bbf92311d969efb4 ]---

Fix it by passing the same cookie to both functions.

Signed-off-by: Emilio G. Cota <cota@braap.org>
[martyn.welch@ge.com: modified to remove checkpatch warnings]
Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>