refine c and h
	modified:   Libraries/drivers/K/inc/gpio.h
	modified:   Libraries/drivers/K/inc/pit.h
	modified:   Libraries/drivers/K/inc/wdog.h
	modified:   Libraries/drivers/K/src/gpio.c
	modified:   Libraries/drivers/K/src/pit.c
	modified:   Libraries/drivers/K/src/wdog.c