Kinetis RNGA driver

RNGA generates data that looks random. Reference Manual recommends to use the RNGA as an entropy source for PRNGs.

RNGA configuration example (for periph_conf.h)

#define RANDOM_NUMOF         (1U)
#define KINETIS_RNGA         RNG
#define RANDOM_CLKEN()       (SIM->SCGC6 |= (1 << 9))
#define RANDOM_CLKDIS()      (SIM->SCGC6 &= ~(1 << 9))