lib: sbi: Fix how to check whether the domain contains fw_region

Because firmware is split into rw/rx segments, it cannot be recorded
by a root_fw_region. This problem is solved by adding a flag
fw_region_inited to sbi_domain.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

lib/utils/fdt/fdt_domain.c

@@ -358,6 +358,7 @@ static int __fdt_parse_domain(void *fdt, int domain_offset, void *opaque)
 			return SBI_EINVAL;
 		memcpy(&regions[val32++], reg, sizeof(*reg));
 	}
+	dom->fw_region_inited = root.fw_region_inited;
 
 	/* Read "boot-hart" DT property */
 	val32 = -1U;