Update the sdkconfig for LILYGO TTGO T8 ESP32-S2

[netroy]

• There is no CONFIG_SPIRAM_SPIWP_SD3_PIN for ESP32-S2
• CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL and CONFIG_SPIRAM_MALLOC_RESERVE_INTERNAL values are just the defaults. Adding them here is redundant.
• CONFIG_SPIRAM_USE_MEMMAP=y fixes LILYGO TTGO T8 ESP32-S2 w/Display crashes after espidf call #4810

[jepler]

Thanks! I can't test this myself, but it does seem to change the configuration to be more like working boards such as espressif_saola_1_wrover. Makes sense.

[anecdata]

Finally got around to testing this on the target board. Confirmed there is no crash with espidf.heap_caps_get_largest_free_block() call:

Adafruit CircuitPython 7.0.0-alpha.4 on 2021-07-08; LILYGO TTGO T8 ESP32-S2 w/Display with ESP32S2
>>> import gc
>>> gc.mem_free()
8192608
>>> 
>>> import espidf
>>> espidf.heap_caps_get_total_size()
155852
>>> espidf.heap_caps_get_free_size()
130460
>>> espidf.heap_caps_get_largest_free_block()
65536
>>>