target/sh4: Mask restore of env->flags from tb->flags

target/sh4: Mask restore of env->flags from tb->flags

The values in env->flags are a subset of tb->flags.
Restore only the bits that belong.

Cc: qemu-stable@nongnu.org
Fixes: ab419fd8a035 ("target/sh4: Fix TB_FLAG_UNALIGN")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-ID: <20221212011345.GA2235238@roeck-us.net>
[rth: Reduce to only the the superh_cpu_synchronize_from_tb change]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
(cherry picked from commit bc2331635ce18ff068d2bb1e493bc546e1f786e1)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>