ESP32: Take away "tbeam" boards PSRAM to reclaim iram (#10036)

You read that right! Disable PSRAM on the ttgo-tbeam board to reclaim *iram*.

ttgo-tbeam.json is a copy of https://github.com/platformio/platform-espressif32/blob/v6.13.0/boards/ttgo-t-beam.json with HAS_PSRAM removed.

PSRAM support on OG-ESP32 involves a lot of iram usage thanks to iram-heavy workarounds that have been added to address hardware bugs.

See https://docs.espressif.com/projects/esp-idf/en/v4.4/esp32/api-guides/performance/ram-usage.html#optimizing-iram-usage

variants/esp32/nano-g1-explorer/platformio.ini

@@ -9,7 +9,7 @@ custom_meshtastic_display_name = Nano G1 Explorer
 custom_meshtastic_tags = B&Q
 
 extends = esp32_base
-board = ttgo-t-beam
+board = ttgo-tbeam
 build_flags = 
   ${esp32_base.build_flags}
   -D NANO_G1_EXPLORER

variants/esp32/nano-g1/platformio.ini

@@ -9,7 +9,7 @@ custom_meshtastic_display_name = Nano G1
 custom_meshtastic_tags = B&Q
 
 extends = esp32_base
-board = ttgo-t-beam
+board = ttgo-tbeam
 build_flags = 
   ${esp32_base.build_flags}
   -D NANO_G1

variants/esp32/station-g1/platformio.ini

@@ -9,10 +9,7 @@ custom_meshtastic_display_name = Station G1
 custom_meshtastic_tags = B&Q
 
 extends = esp32_base
-board = ttgo-t-beam
-build_unflags =
-  ${esp32_common.build_unflags}
-  -DBOARD_HAS_PSRAM
+board = ttgo-tbeam
 build_flags = 
   ${esp32_base.build_flags}
   -D STATION_G1

variants/esp32/tbeam/platformio.ini

@@ -10,14 +10,12 @@ custom_meshtastic_images = tbeam.svg
 custom_meshtastic_tags = LilyGo
 
 extends = esp32_base
-board = ttgo-t-beam
+board = ttgo-tbeam
 
 board_check = true
 build_flags = ${esp32_base.build_flags}
   -D TBEAM_V10
   -I variants/esp32/tbeam
-  -DBOARD_HAS_PSRAM
-  -mfix-esp32-psram-cache-issue
   -ULED_BUILTIN
 upload_speed = 921600
 

variants/esp32/tbeam_v07/platformio.ini

@@ -9,7 +9,7 @@ custom_meshtastic_tags = LilyGo
 
 board_level = extra
 extends = esp32_base
-board = ttgo-t-beam
+board = ttgo-tbeam
 build_flags = 
   ${esp32_base.build_flags}
   -D TBEAM_V07