NIOSII addressing for 32 bit wide SDRAM

So, generating BE = 0xFF transactions from NIOS by using a DMA controller

by first transferring test data from NIOS to 64 bit onchipmem and then 64-bit DMA'ing this

to the 64-bit local bus of the DDR2 controller and then reversing the process to get the

data back to NIOS works fine.

This creates an acceptable workaround for me.

The whole BE = 0x0F/0xF0 thing not working properly is probably going to come down

to the whole partial write support of the controller. Whatever. I have my solution and

don't want to spend any more time thinking about this.