Driver: update firmware metho

http://www.makelinux.net/ldd3/chp-14-sect-8
http://www.mjmwired.net/kernel/Documentation/firmware_class/


/sys/class/firmware

#include 
int request_firmware(const struct firmware **fw, char *name,
                     struct device *device);

struct firmware {
        size_t size;
        u8 *data;
};

void release_firmware(struct firmware *fw);