esx: Use ESX_VI_CHECK_ARG_LIST macro to avoid code duplication

esx: Use ESX_VI_CHECK_ARG_LIST macro to avoid code duplication

By using this macro we can avoid boilerplate code to check for arrays of
objects from ESX driver. This replacement was done using the coccinelle
script bellow:

@@
identifier ptr;
@@

-if (!ptr || *ptr) { ... }
+ESX_VI_CHECK_ARG_LIST(ptr);

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>