In order to help bridged-phy drivers to define init()/exit() functions, define helper macro in gpbridge.h file. Testing Done: Tested on gbsim. Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>