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.