client api: fix ULONG_MAX dependency

ULONG_MAX depends on limits.h.

Fixes: 9faeb1b ("tee_client_api: Correct max shared memory size define")
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>

public/tee_client_api.h

@@ -31,6 +31,7 @@
 
 #include <stdint.h>
 #include <stddef.h>
+#include <limits.h>
 
 /*
  * Defines the number of available memory references in an open session or