Merge pull request #2432 from recrof/kiss-radio-everywhere

kiss radio: added stm32 support + envs in platformio.ini

variants/heltec_t190/platformio.ini

@@ -153,3 +153,8 @@ build_src_filter = ${Heltec_T190_base.build_src_filter}
 lib_deps =
   ${Heltec_T190_base.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Heltec_T190_kiss_modem]
+extends = Heltec_T190_base
+build_src_filter = ${Heltec_T190_base.build_src_filter}
+  +<../examples/kiss_modem/>