mmiotrace: fix printk format

Fix gcc printk format warnings:

next-20080415/arch/x86/mm/mmio-mod.c: In function 'print_pte':
next-20080415/arch/x86/mm/mmio-mod.c:154: warning: format '%lx' expects type 'long unsigned int', but argument 3 has type 'pteval_t'
next-20080415/arch/x86/mm/mmio-mod.c:154: warning: format '%lx' expects type 'long unsigned int', but argument 4 has type 'pteval_t'
next-20080415/arch/x86/mm/mmio-mod.c: At top level:
next-20080415/arch/x86/mm/mmio-mod.c:403: warning: 'downed_cpus' defined but not used

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>