drm/msm: Fix null ptr access msmioctlgem_submit()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.10 by commit f6db3d98f876870c35e96693cfd54752f6199e59. For more details please see the references link.