lib: sbi: verbose sbi_domain_root_add_memregion

Be more verbose on region confict, print addresses in conflict.

Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>