Trim enum identifier
Auto-generated enum identifiers in dispatch loop needs trimming.
s/rpc_ptr_1_kernel_nullnet_rtnl_link_stats64_1_kernel_nullnet_net_device_ndo_get_stats64_1_kernel_nullnet_rtnl_link_stats64_ndo_get_stats64/NDO_GET_STATS_CALLEE/
enum IDs should be all CAPS.