[IA64] Fix a couple of warnings for EXPORT_SYMBOL

To get rid of things like:

arch/ia64/sn/kernel/sn2/sn_hwperf.c:1002:1: warning: data definition has no type or storage class
arch/ia64/sn/kernel/sn2/sn_hwperf.c:1002:1: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
arch/ia64/sn/kernel/sn2/sn_hwperf.c:1002:1: warning: parameter names (without types) in function declaration

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>