[PATCH] i915: ggtt: include asm/smp.h

[Chris Wilson]

Quoting Arnd Bergmann (2020-01-10 15:17:54)
> Splitting up the i915_gem_gtt caused a build failure in some configurations:
> 
> drivers/gpu/drm/i915/gt/intel_ggtt.c: In function 'ggtt_restore_mappings':
> drivers/gpu/drm/i915/gt/intel_ggtt.c:1239:3: error: implicit declaration of function 'wbinvd_on_all_cpus'; did you mean 'wrmsr_on_cpus'? [-Werror=implicit-function-declaration]
>    wbinvd_on_all_cpus();
>    ^~~~~~~~~~~~~~~~~~
>    wrmsr_on_cpus
> 
> Add the missing header file.
> 
> Fixes: 2c86e55d2ab5 ("drm/i915/gtt: split up i915_gem_gtt")
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> ---
> I ran into this bug a few days ago on linux-next. Please just ignore
> if it's already fixed in the meantime.

Fixed applied this morning, thanks for the fixup anyway.
-Chris