security: export security_kernel_load_data function

The firmware_loader can be built as a loadable module, which now
fails when CONFIG_SECURITY is enabled, because a call to the
security_kernel_load_data() function got added, and this is
not exported to modules:

ERROR: "security_kernel_load_data" [drivers/base/firmware_loader/firmware_class.ko] undefined!

Add an EXPORT_SYMBOL_GPL() to make it available here.

Fixes: 6e852651f28e ("firmware: add call to LSM hook before firmware sysfs fallback")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: James Morris <james.morris@microsoft.com>

security/security.c

@@ -1065,6 +1065,7 @@ int security_kernel_load_data(enum kernel_load_data_id id)
 		return ret;
 	return ima_load_data(id);
 }
+EXPORT_SYMBOL_GPL(security_kernel_load_data);
 
 int security_task_fix_setuid(struct cred *new, const struct cred *old,
 			     int flags)