Since the core's response ready signal depends on response valid, but core does
not accept write ACKs, we need to manually assert ready when there is a valid
response coming in for a write regardless of the core's ready state (which would
be 0).
Need to use DCACHE_NOSM_TAG_WIDTH instead of DCACHE_TAG_WIDTH; otherwise, the
`ASSIGN_VX_MEM_BUS_IF macro in VX_smem_unit.sv does assignment of packed structs
with different widths for the tag field, resulting in misaligned bit error.
This results in wrong memory addresses for the core requests.
