drm: Missed clflushopt in drm_clflush_virt_range

With this commit:

2a0788dc x86: Use clflushopt in drm_clflush_virt_range

If clflushopt is available on the system, we use it instead of clflush
in drm_clflush_virt_range.  There were two calls to clflush in this
function, but only one was changed to clflushopt.  This patch changes
the other clflush call to clflushopt.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Matthew Wilcox <matthew.r.wilcox@intel.com>

Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Cc: H Peter Anvin <h.peter.anvin@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_cache.c

@@ -138,7 +138,7 @@ drm_clflush_virt_range(void *addr, unsigned long length)
 		void *end = addr + length;
 		mb();
 		for (; addr < end; addr += boot_cpu_data.x86_clflush_size)
-			clflush(addr);
+			clflushopt(addr);
 		clflushopt(end - 1);
 		mb();
 		return;