Make BlockDevice base address come from Config

[timsnyder-siv]

testchipip/src/main/scala/BlockDevice.scala

Line 460 in 6decad8

0x10015000, manager.beatBytes))

I'm running into a situation where the address used by BlockDeviceController conflicts with other devices in my system. I'd like to move the BlockDevice to fit in our address map.

Would you guys be open to a PR that made the base address come out of the Config?

[jerryz123]

Yes. This would be much appreciated.