drm: use kcalloc now that it is available..

Make the DRM drm_calloc call kcalloc now.

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

drivers/char/drm/drm_memory.c

@@ -65,19 +65,6 @@ int drm_mem_info(char *buf, char **start, off_t offset,
 	return 0;
 }
 
-/** Wrapper around kmalloc() */
-void *drm_calloc(size_t nmemb, size_t size, int area)
-{
-	void *addr;
-
-	addr = kmalloc(size * nmemb, GFP_KERNEL);
-	if (addr != NULL)
-		memset((void *)addr, 0, size * nmemb);
-
-	return addr;
-}
-EXPORT_SYMBOL(drm_calloc);
-
 /** Wrapper around kmalloc() and kfree() */
 void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
 {