target/s390x: Fix PPNO execution with icount

target/s390x: Fix PPNO execution with icount

Executing PERFORM RANDOM NUMBER OPERATION makes QEMU exit with "Bad
icount read" when using record/replay. This is caused by
icount_get_raw_locked() if the current instruction is not the last one
in the respective translation block.

For the x86_64's rdrand this is resolved by calling
translator_io_start(). On s390x one uses IF_IO in order to make this
call happen automatically.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250123123808.194405-1-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>