Added driver for HiFiBerry Amp amplifier add-on board

The driver contains a low-level hardware driver for the TAS5713 and the
drivers for the Raspberry Pi I2S subsystem.
Merge pull request #659 from hifiberry/3.12-amp

Added driver for HiFiBerry Amp amplifier add-on board
bcm2708_fb: Reduce dmesg spam
bcm2708-i2s: Update bclk_ratio to more correct values
Revert "ASoc: Don't report S24_LE support, it produces white noise with xbmc"

This reverts commit 4ba7ea92d22efcb56e1ee9d55a53a73a5a804ad0.
ASoC: simple-card: un-implemented set_fmt is not error

Current simple-card returns error if DAI doesn't
support .set_fmt callback.
But the error is -ENOTSUPP (= not supported),
and it is not error.
This patch avoids such case

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
config: Add module SND_SIMPLE_CARD