nrf: SPI phase and polarity always return 0

[dhalbert]

circuitpython/ports/nrf/common-hal/busio/SPI.c

Lines 334 to 340 in 9ba40de

	uint8_t common_hal_busio_spi_get_phase(busio_spi_obj_t* self) {
	return 0;
	}
	uint8_t common_hal_busio_spi_get_polarity(busio_spi_obj_t* self) {
	return 0;
	}

[dhalbert]

These common_hal routines are not actually called anywhere, so it's only a latent bug. Will fix as part of SPIM3 implementation.

[dhalbert]

Fixed by #2613.