WIP: unify the RAK targets into one firmware (#1350)

* First steps to unify GPS Lib for RAK 1910 and RAK 12500

* Technicalities. Out with the old and build the new.

* Adapt Matrix

* We use 0.4.5 now

* While we're at it, yank the RAK815, it's EOL

* Satisfy CI - for now

* - yank UBX library, talk to GPS chip with NMEA only.
- more autodetect going on, this time for the Eink Display.

TODO: actually do something with the scan findings.

* i swear this works on windows! :-)

* these are only there to make CI happy

* don't update eink display if not detected.

* Replace Oberon Crypt Library with modified Adafruit Library. This elimintaes the need for the sdk-nfxlib submodule.

* - Revert auto screen selection (incomplete)
- Revert nrF crypto engine (needs more work)
- add separate defines for not-auto-selecting screen lib.

* Define 2 new variants for RAK - with or without epaper

* Update variants

Co-authored-by: Sacha Weatherstone <sachaw100@hotmail.com>
Co-authored-by: Ben Meadors <thebentern@tuta.io>

platformio.ini

@@ -16,9 +16,6 @@ default_envs = tbeam
 ;default_envs = t-echo
 ;default_envs = nrf52840dk-geeksville
 ;default_envs = native # lora-relay-v1 # nrf52840dk-geeksville # linux # or if you'd like to change the default to something like lora-relay-v1 put that here
-;default_envs = rak4631_5005
-;default_envs = rak4631_5005_eink
-;default_envs = rak4631_19003
 ;default_envs = nano-g1
 ;default_envs = pca10059_diy_eink
 ;default_envs = meshtastic-diy-v1
@@ -132,7 +129,7 @@ build_type = debug ; I'm debugging with ICE a lot now
 ; note: liboberon provides the AES256 implementation for NRF52 (though not using the hardware acceleration of the NRF52840 - FIXME)
 build_flags = 
   ${arduino_base.build_flags} -Wno-unused-variable 
-  -Isrc/nrf52 
+  -Isrc/nrf52
   -Isdk-nrfxlib/crypto/nrf_oberon/include -Lsdk-nrfxlib/crypto/nrf_oberon/lib/cortex-m4/hard-float/ -lliboberon_3.0.7 
 src_filter = 
   ${arduino_base.src_filter} -<esp32/> -<nimble/> -<mesh/wifi/> -<mesh/http/> -<modules/esp32> -<mqtt/>
@@ -146,6 +143,7 @@ lib_deps =
   ${arduino_base.lib_deps}
   ${environmental.lib_deps}
   Adafruit nRFCrypto
+; https://github.com/Kongduino/Adafruit_nRFCrypto.git
 
 ; Note: By default no lora device is created for this build - it uses a simulated interface
 [env:nrf52840dk]
@@ -156,10 +154,3 @@ board = nrf52840_dk
 [env:feather_nrf52832]
 extends = nrf52_base
 board = adafruit_feather_nrf52832
-
-[env:rak815]
-extends = nrf52_base
-board = rak815
-debug_tool = jlink
-upload_protocol = jlink
-monitor_speed = 115200