/usr/include/powerpc64le-linux-gnu/asm
Edit: /usr/lib/linux/uapi/powerpc/asm/setup.h (188B)
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_POWERPC_SETUP_H
#define _ASM_POWERPC_SETUP_H
#define COMMAND_LINE_SIZE 2048
#endif /* _ASM_POWERPC_SETUP_H */