JR2 VS1053 registers appear to be mangled in the 6809 core

[Nitrobotics]

Describe the issue

The MSB and LSB of the FIFO count have an Endian issue with the 6809

To reproduce

ldd $FF54 Read 16-bit FIFO count

Expected behavior

Should return 16-bit FIFO count, not just the LSB or just the MSB
The core appears to be latching the 16-bit data at the wrong time

Hardware version

Foenix JR2 x1 received around Dec 2024, black PCB
Uses: F256JrJr_FNX6809_June14th_RC0017_0003.mcs