max SPI speed for TI814x is 48MHz as per TRM Sec 22.1.2
Change i2c bus #1 speed to 400kHz.
use TI81XX one clock cycle granularity to set SPI clock speed.
ASI1230: Add HWTSTAMP_TX_ONESTEP_SYNC enum to net_tstamp.h
ASI1230: Rearrange LEDs for revB
ASI1230: Add revB LED from 4 to 7 (numbered 5 to 8 on board)
ASI1230: Re-enable SPI flash on bus 1, cs0 for revB h/w.  Remove bus1, cs2 - we don't have this one.  Add bus2, cs1 (will be PGA2505).
ASI1230: PTP class driver: Add support for setting/getting the underlying clock's center frequency
ASI1230: Add support for setting the center frequency to the ti814x generic PLL PTP driver