parisc: processor: Include asm/smp.h for init_per_cpu()

Fix sparse warning that init_per_cpu() isn't declared.
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/kernel/processor.c

@@ -26,6 +26,7 @@
 #include <asm/processor.h>
 #include <asm/page.h>
 #include <asm/pdc.h>
+#include <asm/smp.h>
 #include <asm/pdcpat.h>
 #include <asm/irq.h>		/* for struct irq_region */
 #include <asm/parisc-device.h>