fix(wifi): Add support to move supplicant BSS to external memory

components/wpa_supplicant/CMakeLists.txt

@@ -2,6 +2,8 @@ idf_build_get_property(target IDF_TARGET)
 
 if(${target} STREQUAL "linux")
     return() # This component is not supported by the POSIX/Linux simulator
+else()
+    set(linker_fragments linker.lf)
 endif()
 
 set(srcs "port/os_xtensa.c"
@@ -217,6 +219,7 @@ idf_component_register(SRCS "${srcs}" "${esp_srcs}" "${tls_src}" "${roaming_src}
                             "${crypto_src}" "${mbo_src}" "${dpp_src}" "${wps_registrar_src}"
                     INCLUDE_DIRS include port/include esp_supplicant/include
                     PRIV_INCLUDE_DIRS src src/utils esp_supplicant/src src/crypto
+                    LDFRAGMENTS   ${linker_fragments}
                     PRIV_REQUIRES mbedtls esp_timer esp_wifi)
 
 target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-strict-aliasing -Wno-write-strings -Werror)

components/wpa_supplicant/linker.lf

@@ -0,0 +1,5 @@
+[mapping:wpa_supplicant]
+archive: libwpa_supplicant.a
+entries:
+    if ESP_ALLOW_BSS_SEG_EXTERNAL_MEMORY = y:
+        * (extram_bss)