powerpc: Move include files to arch/powerpc/include/asm

from include/asm-powerpc.  This is the result of a

mkdir arch/powerpc/include/asm
git mv include/asm-powerpc/* arch/powerpc/include/asm

Followed by a few documentation/comment fixups and a couple of places
where <asm-powepc/...> was being used explicitly.  Of the latter only
one was outside the arch code and it is a driver only built for powerpc.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/include/asm/scatterlist.h

@@ -0,0 +1,50 @@
+#ifndef _ASM_POWERPC_SCATTERLIST_H
+#define _ASM_POWERPC_SCATTERLIST_H
+/*
+ * Copyright (C) 2001 PPC64 Team, IBM Corp
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <asm/dma.h>
+
+struct scatterlist {
+#ifdef CONFIG_DEBUG_SG
+	unsigned long sg_magic;
+#endif
+	unsigned long page_link;
+	unsigned int offset;
+	unsigned int length;
+
+	/* For TCE support */
+	dma_addr_t dma_address;
+	u32 dma_length;
+};
+
+/*
+ * These macros should be used after a dma_map_sg call has been done
+ * to get bus addresses of each of the SG entries and their lengths.
+ * You should only work with the number of sg entries pci_map_sg
+ * returns, or alternatively stop on the first sg_dma_len(sg) which
+ * is 0.
+ */
+#define sg_dma_address(sg)	((sg)->dma_address)
+#ifdef __powerpc64__
+#define sg_dma_len(sg)		((sg)->dma_length)
+#else
+#define sg_dma_len(sg)		((sg)->length)
+#endif
+
+#ifdef __powerpc64__
+#define ISA_DMA_THRESHOLD	(~0UL)
+#endif
+
+#define ARCH_HAS_SG_CHAIN
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_SCATTERLIST_H */