drm: cleanup old compat code and DRM fns from Linux only code

This patch removes some of the old compatibility macros from the DRM,
and removes use of DRM wrappers from Linux specific code.

Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/char/drm/drm_proc.c

@@ -510,7 +510,7 @@ static int drm__vma_info(char *buf, char **start, off_t offset, int request,
 			       vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 			       vma->vm_flags & VM_LOCKED ? 'l' : '-',
 			       vma->vm_flags & VM_IO ? 'i' : '-',
-			       VM_OFFSET(vma));
+			       vma->vm_pgoff << PAGE_SHIFT);
 
 #if defined(__i386__)
 		pgprot = pgprot_val(vma->vm_page_prot);