drm/i915: Mark the static key for movntqda as static

Silence sparse who warns that the global variable is not declared
static.

Fixes: 0b1de5d58e19 ("drm/i915: Use SSE4.1 movntdqa to ...")
Signed-off-by: Chris Wilson <[e-mail]>
Cc: Akash Goel <[e-mail]>
Cc: Damien Lespiau <[e-mail]>
Cc: Mika Kuoppala <[e-mail]>
Cc: Tvrtko Ursulin <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]
Reviewed-by: Tvrtko Ursulin <[e-mail]>

drivers/gpu/drm/i915/i915_memcpy.c

···
 
 #include "i915_drv.h"
 
-DEFINE_STATIC_KEY_FALSE(has_movntdqa);
+static DEFINE_STATIC_KEY_FALSE(has_movntdqa);
 
 #ifdef CONFIG_AS_MOVNTDQA
 static void __memcpy_ntdqa(void *dst, const void *src, unsigned long len)