drm/i915/gvt: Remove unused intel_gvt_in_force_nonpriv_whitelist

The last use of intel_gvt_in_force_nonpriv_whitelist() was
removed in 2020 by
commit 02dd2b12 ("drm/i915/gvt: unify lri cmd handler and mmio
handlers")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Zhenyu Wang <zhenyuw.linux@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241222002043.173080-4-linux@treblig.org


Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>