mfd: arizona: Add convience defines for micd_rate/micd_bias_starttime

#define ARIZONA_INMODE_SE   1

#define ARIZONA_INMODE_DMIC 2

#define ARIZONA_MICD_TIME_CONTINUOUS                 0

#define ARIZONA_MICD_TIME_250US                      1

#define ARIZONA_MICD_TIME_500US                      2

#define ARIZONA_MICD_TIME_1MS                        3

#define ARIZONA_MICD_TIME_2MS                        4

#define ARIZONA_MICD_TIME_4MS                        5

#define ARIZONA_MICD_TIME_8MS                        6

#define ARIZONA_MICD_TIME_16MS                       7

#define ARIZONA_MICD_TIME_32MS                       8

#define ARIZONA_MICD_TIME_64MS                       9

#define ARIZONA_MICD_TIME_128MS                      10

#define ARIZONA_MICD_TIME_256MS                      11

#define ARIZONA_MICD_TIME_512MS                      12

#endif