pci-dma: add linux/pci-dma.h to linux/pci.h

All the architectures properly set NEED_DMA_MAP_STATE now so we can safely
add linux/pci-dma.h to linux/pci.h and remove the linux/pci-dma.h
inclusion in arch's asm/pci.h

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/pci.h b/include/linux/pci.h
index cd5809a..7fd5c57 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -904,6 +904,7 @@
 		      unsigned int command_bits, bool change_bridge);
 /* kmem_cache style wrapper around pci_alloc_consistent() */
 
+#include <linux/pci-dma.h>
 #include <linux/dmapool.h>
 
 #define	pci_pool dma_pool