sdk: update to v2.2.0-3-gf8f27ce

- Fixes WiFi not being able to reconnect after SDK update (#4398)
- Fixes increased current in light sleep mode
- Fixes return value documentation for wifi_{get,set}_country

tools/sdk/include/user_interface.h

@@ -729,8 +729,8 @@ typedef struct {
   *
   * @param     wifi_country_t *country: the configured country info
   *
-  * @return  0 : succeed
-  * @return -1 : fail
+  * @return  true : succeed
+  * @return false : fail
   */
 bool wifi_set_country(wifi_country_t *country);
 
@@ -739,8 +739,8 @@ bool wifi_set_country(wifi_country_t *country);
   *
   * @param     wifi_country_t *country: country info
   *
-  * @return  0 : succeed
-  * @return -1 : fail
+  * @return  true : succeed
+  * @return false : fail
   */
 bool wifi_get_country(wifi_country_t *country);