Optimization flags for all NRF52 targets to reduce code size (#8854)

* changes of variants/nrf52840/nrf52.ini and variants/nrf52840/rak4631/platformio.ini

* try for nrf52 size reduction, faketec exclude unused radios and meshlink refactor

* can't exclude LR11X0 as in schematic there's option for LR1121

* remove -Map flag and -Wl

* removed spaces causing error

---------

Co-authored-by: macvenez <macvenez@gmail.com>

variants/nrf52840/meshlink/platformio.ini

@@ -9,6 +9,30 @@ board_level = extra
 build_flags = ${nrf52840_base.build_flags}
   -I variants/nrf52840/meshlink
   -D MESHLINK
+  -DRADIOLIB_EXCLUDE_SX128X=1
+  -DRADIOLIB_EXCLUDE_SX127X=1
+  -DRADIOLIB_EXCLUDE_LR11X0=1
+  
+build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/meshlink>
+lib_deps = 
+  ${nrf52840_base.lib_deps}
+debug_tool = jlink
+; If not set we will default to uploading over serial (first it forces bootloader entry by talking 1200bps to cdcacm)
+; Note: as of 6/2013 the serial/bootloader based programming takes approximately 30 seconds
+;upload_protocol = jlink
+
+[env:meshlink_eink]
+extends = nrf52840_base
+board = meshlink
+board_level = extra
+;board_check = true
+build_flags = ${nrf52840_base.build_flags}
+  -I variants/nrf52840/meshlink
+  -D MESHLINK
+  -DRADIOLIB_EXCLUDE_SX128X=1
+  -DRADIOLIB_EXCLUDE_SX127X=1
+  -DRADIOLIB_EXCLUDE_LR11X0=1
+  -D USE_EINK
   -D EINK_DISPLAY_MODEL=GxEPD2_213_B74
   -D EINK_WIDTH=250
   -D EINK_HEIGHT=122