Replace old api esp_event_loop_init() by new api
Rewrite WIFI_COUNTRY_POLICY_AUTO's description
Remove fast_crypto's comment considering this API has been removed in versin 4.0
Fix some other erros
Replace periph_module_enable/disable by periph_wifi_bt_common_module_enable which are in IRAM.
AddIRAM_ATTR periph_ll_wifi_bt_module_enable_clk_clear_rstandIRAM_ATTR periph_ll_wifi_bt_module_disable_clk_set_rstto fit O0 optimization level.
Delete duplicated spinlock and counter.