drivers: wifi: resolve undefined macros when CONFIG_POSIX_API is set

When CONFIG_POSIX_API is set in lieu of CONFIG_NET_SOCKETS_POSIX_NAMES,
some macros such as POLLIN, POLLOUT and MSG_PEEK are undefined, and
the appropriate posix headers need to be included to access those.

Signed-off-by: Vincent Wan <vwan@ti.com>

drivers/wifi/simplelink/simplelink_sockets.c

@@ -23,6 +23,12 @@ LOG_MODULE_DECLARE(LOG_MODULE_NAME);
 #include "sockets_internal.h"
 #include "tls_internal.h"
 
+/* Need these for POLLIN, POLLOUT, MSG_PEEK, etc. */
+#if defined(CONFIG_POSIX_API)
+#include "posix/poll.h"
+#include "posix/sys/socket.h"
+#endif
+
 #define FAILED (-1)
 
 /* Increment by 1 to make sure we do not store the value of 0, which has