Update SDK to 2.0.0

- Update SDK header files and libraries to SDK 2.0.0 plus 2.0.0_16_08_09
  patch
- Remove mem_manager.o from libmain.a (replaced with umm_malloc)
- Disable switch from DIO to QIO mode for certain flash chips (saves
  IRAM space)
- Add user_rf_cal_sector_set; it points to rf_init_data sector.
- Change the way rf_init_data is spoofed.
  This is now done by wrapping spi_flash_read and returning the data we
  need during startup sequence.
- Place lwip library into flash using linker script instead of section
  attributes (saves IRAM space)

tools/sdk/include/wpa2_enterprise.h

@@ -0,0 +1,38 @@
+#ifndef __WPA2_ENTERPRISE_H__
+#define __WPA2_ENTERPRISE_H__
+
+typedef long os_time_t;
+
+struct os_time {
+	os_time_t sec;
+	os_time_t usec;
+};
+
+typedef int (* get_time_func_t)(struct os_time *t);
+
+int  wifi_station_set_wpa2_enterprise_auth(int enable);
+
+int  wifi_station_set_enterprise_cert_key(u8 *client_cert, int client_cert_len,
+			u8 *private_key, int private_key_len,
+			u8 *private_key_passwd, int private_key_passwd_len);
+void  wifi_station_clear_enterprise_cert_key(void);
+
+int  wifi_station_set_enterprise_ca_cert(u8 *ca_cert, int ca_cert_len);
+void  wifi_station_clear_enterprise_ca_cert(void);
+
+int  wifi_station_set_enterprise_username(u8 *username, int len);
+void  wifi_station_clear_enterprise_username(void);
+
+int  wifi_station_set_enterprise_password(u8 *password, int len);
+void  wifi_station_clear_enterprise_password(void);
+
+int  wifi_station_set_enterprise_new_password(u8 *new_password, int len);
+void  wifi_station_clear_enterprise_new_password(void);
+
+void  wifi_station_set_enterprise_disable_time_check(bool disable);
+bool  wifi_station_get_enterprise_disable_time_check(void);
+
+void  wpa2_enterprise_set_user_get_time(get_time_func_t cb);
+
+
+#endif /* __WPA2_ENTERPRISE_H__ */