arch/esp32: Re-organise shared functions and options for ESP32 Wireless code

- Introduce the ESP32_WIFI option to replace the broader
ESP32_WIRELESS option.  ESP32_WIRELESS is used by both WIFI and BLE.

 - Move common functions from esp32_wifi_adapter to esp32_wireless.

 - Change the order of including the external libraries to avoid undefined references.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>

boards/xtensa/esp32/esp32-ethernet-kit/configs/autopm/defconfig

@@ -27,8 +27,8 @@ CONFIG_ESP32_SPIFLASH=y
 CONFIG_ESP32_SPIFLASH_SPIFFS=y
 CONFIG_ESP32_STORAGE_MTD_SIZE=0x80000
 CONFIG_ESP32_UART0=y
+CONFIG_ESP32_WIFI=y
 CONFIG_ESP32_WIFI_SAVE_PARAM=y
-CONFIG_ESP32_WIRELESS=y
 CONFIG_EXAMPLE_POWER_SAVE_MIN_MODEM=y
 CONFIG_FS_PROCFS=y
 CONFIG_HAVE_CXX=y

boards/xtensa/esp32/esp32-ethernet-kit/configs/mcuboot_update_agent/defconfig

@@ -32,7 +32,7 @@ CONFIG_DRIVERS_WIRELESS=y
 CONFIG_ESP32_APP_FORMAT_MCUBOOT=y
 CONFIG_ESP32_SPIFLASH=y
 CONFIG_ESP32_UART0=y
-CONFIG_ESP32_WIRELESS=y
+CONFIG_ESP32_WIFI=y
 CONFIG_EXAMPLES_MCUBOOT_UPDATE_AGENT=y
 CONFIG_EXAMPLES_MCUBOOT_UPDATE_AGENT_DL_BUFFER_SIZE=4096
 CONFIG_EXPERIMENTAL=y

boards/xtensa/esp32/esp32-ethernet-kit/configs/wapi/defconfig

@@ -26,8 +26,8 @@ CONFIG_ESP32_SPIFLASH=y
 CONFIG_ESP32_SPIFLASH_SPIFFS=y
 CONFIG_ESP32_STORAGE_MTD_SIZE=0x80000
 CONFIG_ESP32_UART0=y
+CONFIG_ESP32_WIFI=y
 CONFIG_ESP32_WIFI_SAVE_PARAM=y
-CONFIG_ESP32_WIRELESS=y
 CONFIG_FS_PROCFS=y
 CONFIG_HAVE_CXX=y
 CONFIG_HAVE_CXXINITIALIZE=y

boards/xtensa/esp32/esp32-ethernet-kit/src/esp32_bringup.c

@@ -69,7 +69,7 @@
 #  include "esp32_ble.h"
 #endif
 
-#ifdef CONFIG_ESP32_WIRELESS
+#ifdef CONFIG_ESP32_WIFI
 #  include "esp32_board_wlan.h"
 #endif
 
@@ -176,7 +176,7 @@ int esp32_bringup(void)
     }
 #endif
 
-#ifdef CONFIG_ESP32_WIRELESS
+#ifdef CONFIG_ESP32_WIFI
   ret = board_wlan_init();
   if (ret < 0)
     {