[noup] zephyr: Fix header file path

Fix header include path for eloop.h when
including ctrl_iface_zephyr.h from another module.

Issue is observed while compiling the Wi-Fi shell sample
with enterprise mode support enabled. Include eloop.h
in `ctrl_iface_zephyr.h` using a relative path, which causes
a build failure when the file is included from outside the
supplicant module.

Build error:
  fatal error: eloop.h: No such file or directory

Signed-off-by: Triveni Danda <[email protected]>

Author: D-Triveni

wpa_supplicant/ctrl_iface_zephyr.h

@@ -9,7 +9,7 @@
 #include "utils/includes.h"
 
 #include "utils/common.h"
-#include "eloop.h"
+#include "utils/eloop.h"
 #include "config.h"
 #include "eapol_supp/eapol_supp_sm.h"
 #include "wpa_supplicant_i.h"