[SPARC64]: Add generic iommu and strbuf structs to iommu.h

	unsigned int	limit;

};

struct iommu {

	spinlock_t		lock;

	struct iommu_arena	arena;

	iopte_t			*page_table;

	u32			page_table_map_base;

	unsigned long		iommu_control;

	unsigned long		iommu_tsbbase;

	unsigned long		iommu_flush;

	unsigned long		iommu_ctxflush;

	unsigned long		write_complete_reg;

	unsigned long		dummy_page;

	unsigned long		dummy_page_pa;

	unsigned long		ctx_lowest_free;

	DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);

	u32			dma_addr_mask;

};

struct strbuf {

	int			strbuf_enabled;

	unsigned long		strbuf_control;

	unsigned long		strbuf_pflush;

	unsigned long		strbuf_fsync;

	unsigned long		strbuf_ctxflush;

	unsigned long		strbuf_ctxmatch_base;

	unsigned long		strbuf_flushflag_pa;

	volatile unsigned long *strbuf_flushflag;

	volatile unsigned long	__flushflag_buf[(64+(64-1)) / sizeof(long)];

};

#endif /* !(_SPARC_IOMMU_H) */