rtc: s35390a: change FLAG defines to use BIT macro

To be consistent change the S35390A_FLAG defines to use the BIT
macro (like the S35390A_INT2_MODE defines).

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
1 file changed