drm/i915: unpin on error in intel_vgpu_shadow_mm_pin()

stable inclusion
from stable-v5.10.163
commit e5a05837445e48620636551d5de98ddd3939ad7f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7PJ9N

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e5a05837445e48620636551d5de98ddd3939ad7f



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[ Upstream commit 3792fc50 ]

Call intel_vgpu_unpin_mm() on this error path.

Fixes: 41874148 ("drm/i915/gvt: Adding ppgtt to GVT GEM context after shadow pdps settled.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/Y3OQ5tgZIVxyQ/WV@kili


Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: zhaoxiaoqiang11 <zhaoxiaoqiang11@jd.com>