run into bug for lpddr5 with close-row policy

[gxflying]

Hi sir:
I am try to used LPDDR5 with close row policy, but I run into exceptions when simulation
and the exception is triggered by ClosedRowPolicy::setup the below line, because that the LPDDR5 does NOT have a "close-row" element in m_requests !
m_PRE_req_id = m_dram->m_requests("close-row");

the declaration of the LPDDR5 m_requests is showed below:
inline static constexpr ImplDef m_requests = {
"read16", "write16",
"all-bank-refresh", "per-bank-refresh"
};