Zephyr: fix POSIX time include

The sys/time.h header causes redefinition errors regarding the fd_set
type and the select call inside socket_select.h. We want to include the
regular time.h header anyway, as done in random.c.

Signed-off-by: Tobias Frauenschläger <t.frauenschlaeger@me.com>

tmp

wolfssl/wolfcrypt/wc_port.h

@@ -982,7 +982,7 @@ WOLFSSL_ABI WOLFSSL_API int wolfCrypt_Cleanup(void);
     #ifndef _POSIX_C_SOURCE
         #include <zephyr/posix/time.h>
     #else
-        #include <sys/time.h>
+        #include <time.h>
     #endif
 
     time_t z_time(time_t *timer);