samples: wifi: sta: Fix Wi-Fi ready disabled build

Add a guard for the include file. There is a twister test for this, but
as the is available in NCS it works, but in upstream this doesn't work
as the include file is missing and hence throws a build error.

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

samples/wifi/sta/src/main.c

@@ -23,7 +23,9 @@ LOG_MODULE_REGISTER(sta, CONFIG_LOG_DEFAULT_LEVEL);
 #include <zephyr/net/net_event.h>
 #include <zephyr/drivers/gpio.h>
 
+#ifdef CONFIG_WIFI_READY_LIB
 #include <net/wifi_ready.h>
+#endif /* CONFIG_WIFI_READY_LIB */
 
 #if defined(CONFIG_BOARD_NRF7002DK_NRF7001_NRF5340_CPUAPP) || \
 	defined(CONFIG_BOARD_NRF7002DK_NRF5340_CPUAPP)