tmem: cleanup: drop tmem_lock_all

tmem: cleanup: drop tmem_lock_all

tmem_lock_all is used for debug only, remove it from upstream to make
tmem source code more readable and easier to maintain.
And no_evict is meaningless without tmem_lock_all, this patch removes it
also.

This also fixes CID 1055654 Thread deadlock

[ Two threads will be stuck waiting forever if each holds a lock the other needs to acquire.
In alloc_heap_pages: Threads may try to acquire two locks in different orders, potentially
causing deadlock (CWE-833)]

Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>