add sdkconfig for PCM5102A sdkconfig_custom_PCM5102A

[LeoSum8]

Working config for an ESP32 (tested on ESP-WROOM-32 module using ESP32-D0WD-V3 chip revision v3.0) with a PCM5102A DAC, using the following PINS:

CONFIG_MASTER_I2S_BCK_PIN=26
CONFIG_MASTER_I2S_LRCK_PIN=25
CONFIG_MASTER_I2S_DATAOUT_PIN=22
CONFIG_PCM5102A_MUTE_PIN=33

enables DSP and soft volume control that is required for this dac.
enables sample stuffing.

[CarlosDerSeher]

Are those the default pins from menuconfig or did you change them?

[LeoSum8]

I changed them. I think originally I was inspired by this one here when I tried to get the DAC to work so I used the same Pins.

But what do you mean by default pins from menuconfig?
To me, after selecting that DAC in menuconfig, the default pins didn't make any sense. E.g. i2s slave still needed to be manually set to -1.

[CarlosDerSeher]

Ok, I'll see to that, probably i2s slave should be removed as it is unused anyhow. It's just some relic from the beginning of the project.
Maybe I'll just change the defaults to the ones you provide for i2s master.