samsung: don't bother with setting VM_IO

io_remap_pfn_range() will set it just fine
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sound/soc/samsung/idma.c

@@ -257,7 +257,6 @@ static int idma_mmap(struct snd_pcm_substream *substream,
 
 	/* From snd_pcm_lib_mmap_iomem */
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-	vma->vm_flags |= VM_IO;
 	size = vma->vm_end - vma->vm_start;
 	offset = vma->vm_pgoff << PAGE_SHIFT;
 	ret = io_remap_pfn_range(vma, vma->vm_start,