cpu.c requires "exec/exec-all.h" to call tlb_flush() and
"qemu/accel.h" to call accel_cpu_realizefn().

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220214183144.27402-6-f4bug@amsat.org>