ASoC: ti: davinci-i2s: Add handling of BP_FC format

McBSP is able to drive bit clock and consume frame clock but BP_FC
format is not handled by McBSP driver.

Add BP_FC format support.
When BP_FC is selected:
  - CLKX and CLKR are configured as outputs
  - The sample rate generator is configured to be able to provide bit
    clock.

Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://msgid.link/r/20240402071213.11671-9-bastien.curutchet@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>