hw/cpu: Include missing 'qemu/accel.h' header

cpu_common_realize() calls accel_cpu_common_realize(), itself declared in "qemu/accel.h". Include the latter, otherwise we get when refactoring unrelated headers: hw/core/cpu-common.c:233:10: error: implicit declaration of function ‘accel_cpu_common_realize’ 233 | if (!accel_cpu_common_realize(cpu, errp)) { | ^~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20260811183410.22428-3-philmd@oss.qualcomm.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>