forked from Mirrors/opensbi

Avoid getting messages from multiple harts (using dprintf and printf) concurrently with a spinlock serializaing calls to sbi_dprintf(), sbi_printf() and sbi_puts() Signed-off-by: Dong Du <Dd_nirvana@sjtu.edu.cn> Reviewed-by: Xiang W <wxjstz@126.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>