ltp: mmapstress01: remove from disabled tests

The test works just fine as tested on device. So, remove it
from disabled test.

Bug: 31152868
Test: run vts-kernel -m VtsKernelLtp -t mm.mmapstress01

Change-Id: Idc65f3ff498f41d7a40d8ebea5fd962c1917b2b3
Signed-off-by: Sandeep Patil <sspatil@google.com>
1 file changed