ERINDEX
val |= reg_encode(reg, ERINDEX, channel->evt_ring_id);
[ERINDEX] = GENMASK(18, 14),
[ERINDEX] = GENMASK(18, 14),
[ERINDEX] = GENMASK(18, 14),
[ERINDEX] = GENMASK(18, 14),
[ERINDEX] = GENMASK(18, 14),
[ERINDEX] = GENMASK(18, 14),
[ERINDEX] = GENMASK(31, 24),