remove is_buffer_dma_capable()

is_buffer_dma_capable() was replaced with dma_capable().

is_buffer_dma_capable() tells if a buffer is dma-capable or
not. However, it doesn't take a pointer to struct device so it doesn't
work for POWERPC.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 07dfd46..c0f6c3c 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -98,11 +98,6 @@
 	return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
 }
 
-static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
-{
-	return addr + size <= mask;
-}
-
 #ifdef CONFIG_HAS_DMA
 #include <asm/dma-mapping.h>
 #else