Fix a possible memory leak.  Change the name of the 'new_sn_irq_info'
variable to 'tmp_sn_irq_info' since we're not really allocating a new
kernel sn_irq_info, we just getting new target information from the
PROM and replacing it in the kernel's sn_irq_info for the given irq
Signed-off-by: Patrick Gefre <pfg@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>