BugLink: https://bugs.launchpad.net/bugs/1868627

[ Upstream commit 40efb09a ]

In vmw_cmdbuf_res_add if drm_ht_insert_item fails the allocated memory
for cres should be released.

Fixes: 18e4a466 ("drm/vmwgfx: Fix compat shader namespace")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>