drm/xe: Drop VM dma-resv lock on xe_sync_in_fence_get failure in exec IOCTL
In the Linux kernel, the following vulnerability has been resolved:

drm/xe: Drop VM dma-resv lock on xe_sync_in_fence_get failure in exec IOCTL

Upon failure all locks need to be dropped before returning to the user.

(cherry picked from commit 7d1a4258e602ffdce529f56686925034c1b3b095)