ARM: dma-mapping: remove init_consistent_dma_size() stub

Since commit e9da6e99 ("ARM: dma-mapping: remove custom consistent
dma region") setting consistent dma memory size is not longer required. All
calls to this function has been already removed, so the
init_consistent_dma_size() stub can also be gone.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

arch/arm/include/asm/dma-mapping.h

@@ -210,13 +210,6 @@ static inline void dma_free_writecombine(struct device *dev, size_t size,
  */
 extern void __init init_dma_coherent_pool_size(unsigned long size);
 
-/*
- * This can be called during boot to increase the size of the consistent
- * DMA region above it's default value of 2MB. It must be called before the
- * memory allocator is initialised, i.e. before any core_initcall.
- */
-static inline void init_consistent_dma_size(unsigned long size) { }
-
 /*
  * For SA-1111, IXP425, and ADI systems  the dma-mapping functions are "magic"
  * and utilize bounce buffers as needed to work around limited DMA windows.