Add one IMSG line before OP-TEE init message

Otherwise at least on Hikey, it comes partway through an a-t-f
message and is hard to parse.

Signed-off-by: Andy Green <andy@warmcat.com>

core/arch/arm/kernel/generic_boot.c

@@ -614,6 +614,7 @@ static void init_primary_helper(unsigned long pageable_part,
 
 	init_runtime(pageable_part);
 
+	IMSG("\n");
 	IMSG("Initializing (%s)\n", core_v_str);
 
 	thread_init_primary(generic_boot_get_handlers());