hw/loongarch: Add slave cpu boot_code

Load the slave CPU boot code at pflash0 and set
the slave CPU elf_address to VIRT_FLASH0_BASE.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Message-Id: <20240426091551.2397867-4-gaosong@loongson.cn>
1 file changed