Add HardwareModel and correct directories

variants/nrf52840/t-rex/platformio.ini

@@ -3,12 +3,14 @@
 extends = nrf52840_base
 board = t-rex
 board_check = true
-build_flags = ${nrf52840_base.build_flags} -Ivariants/t-rex -D T_REX
+build_flags = ${nrf52840_base.build_flags}
+  -Ivariants/nrf52840/t-rex
+  -D T_REX
   -DGPS_POWER_TOGGLE ; comment this line to disable triple press function on the user button to turn off gps entirely.
   -DRADIOLIB_EXCLUDE_SX128X=1
   -DRADIOLIB_EXCLUDE_SX127X=1
   -DRADIOLIB_EXCLUDE_LR11X0=1
-build_src_filter = ${nrf52_base.build_src_filter} +<../variants/t-rex> +<mesh/api/> +<mqtt/>
+build_src_filter = ${nrf52_base.build_src_filter} +<../variants/nrf52840/t-rex> +<mesh/api/> +<mqtt/>
 lib_deps = 
   ${nrf52840_base.lib_deps}
   ${networking_base.lib_deps}