tmem: Remove the old tmem control XSM checks as it is part of sysctl hypercall.

tmem: Remove the old tmem control XSM checks as it is part of sysctl hypercall.

The sysctl is where the tmem control operations are done and the
XSM checks are done via there. The old mechanism (to check
for control tmem op XSM from do_tmem_op) is not needed anymore.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>