hoc-sys: revert to an ancient version that works on mariko units

Source/sys-clk/common/src/client/ipc.c

@@ -148,9 +148,3 @@ Result sysclkIpcSetReverseNXRTMode(ReverseNXMode mode)
 {
     return serviceDispatchIn(&g_sysclkSrv, SysClkIpcCmd_SetReverseNXRTMode, mode);
 }
-
-Result hocClkIpcUpdateEmcRegs()
-{
-    int nil = 0;
-    return serviceDispatchIn(&g_sysclkSrv, SysClkIpcCmd_SetReverseNXRTMode, nil);
-}