new ldscript for extrafs nrf companion envs

variants/sensecap_solar/platformio.ini

@@ -74,6 +74,8 @@ build_src_filter = ${SenseCap_Solar.build_src_filter}
 
 [env:SenseCap_Solar_companion_radio_ble]
 extends = SenseCap_Solar
+board_build.ldscript = boards/nrf52840_s140_v7_extrafs.ld
+board_upload.maximum_size = 708608
 build_flags =
   ${SenseCap_Solar.build_flags}
   -D MAX_CONTACTS=350
@@ -92,6 +94,8 @@ lib_deps =
 
 [env:SenseCap_Solar_companion_radio_usb]
 extends = SenseCap_Solar
+board_build.ldscript = boards/nrf52840_s140_v7_extrafs.ld
+board_upload.maximum_size = 708608
 build_flags =
   ${SenseCap_Solar.build_flags}
   -D MAX_CONTACTS=350