Allow arbitrary and possibly unaligned writes to RDRAM through gdb #1639
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We want to allow arbitrary writes through the GDB server to the RDRAM area. This was done in #1620, but that version has a subtle issue where the server will still refuse to write or change writes that happen to be of size
Byte|Half|Word|Dual
if the addressed is not aligned to that size.This PR fixes the issue by checking if the write is to RDRAM first, allowing arbitrary and possibly unaligned writes. Otherwise, the write is handled through the normal machinery where these issues may be semantically important.