Improve S-List-Fault handler

When a page fault happens with EIP == ExpInterlockedPopEntrySListFault, then this can bei
a) the result of a race condition,
b) an item in the SLIST which doesn't exist anymore (bug) or
c) an SLIST item in paged out memory.

a) is handled by restarting the operation, b) is already handled in the path below, so there is no need to dispatch an access violation, c) requires to call MmAccessFault below, so dispatching the exception would break slist items in paged memory.