accel/tcg: Don't treat invalid TLB entries as needing recheck

accel/tcg: Don't treat invalid TLB entries as needing recheck

In get_page_addr_code() when we check whether the TLB entry
is marked as TLB_RECHECK, we should not go down that code
path if the TLB entry is not valid at all (ie the TLB_INVALID
bit is set).

Tested-by: Laurent Vivier <[email protected]>
Reported-by: Laurent Vivier <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>
Message-Id: <20180629161731[email protected]>
Signed-off-by: Richard Henderson <[email protected]>