ASoC: SOF: refine and unify sof_xxx_priv structs

[keyonjie]

All sof_pci_priv, sof_acpi_priv and sof_spi_priv are exactly same
structs, here unify them and put it to sof-priv.h.

Signed-off-by: Keyon Jie [email protected]

[keyonjie]

@ranj063 please help review.

[ranj063]

@keyonjie , looks good to me. This is also needed for acquiring the sof device in the snd_sof_suspend/resume methods too.

[plbossart]

Humm, good point but it's probably worth waiting for @lgirdwood 's feedback. There are odd things in the code such as

priv->sof_pdata = sof_pdata;
sof_pdata->spi = spi;
sof_pdata->dev = dev;

which probably never compiled, so we should do the right thing and make an educated decision here based on the need for differentiation between different types of devices.

[lgirdwood]

Probably no need to store spi since it can be referenced by cointainer_of(dev) ?

[keyonjie]

@plbossart good finding, "sof_pdata->spi" won't compile, that should be another fix. As @lgirdwood mentioned, we can use container_of to retrieve all pci_dev/platform_device/spi_device from sof_pdata->dev.

@plbossart can you merge this firstly, then I will add another patch(remove pci_dev/platform_device/spi_dev) to fix the spi compiling issue on top of it.