accel: Rename 'system/accel-ops.h' -> 'accel/accel-cpu-ops.h'

Unfortunately "system/accel-ops.h" handlers are not only
system-specific. For example, the cpu_reset_hold() hook
is part of the vCPU creation, after it is realized.

Mechanical rename to drop 'system' using:

  $ sed -i -e s_system/accel-ops.h_accel/accel-cpu-ops.h_g \
              $(git grep -l system/accel-ops.h)

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250703173248.44995-38-philmd@linaro.org>
12 files changed