accel/tcg: Properly implement get_page_addr_code for user-only

accel/tcg: Properly implement get_page_addr_code for user-only

The current implementation is a no-op, simply returning addr.
This is incorrect, because we ought to be checking the page
permissions for execution.

Make get_page_addr_code inline for both implementations.

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>