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Created by Evan Lojewski@meklortMaintainer

fsi: Fix a race condition resulting in some FSI accesses being lost.

Previously, back-to-back FSI transactions could happen before the FSI state machine was complete. This ensures that the FSI master does not have an active transaction before starting a new one.

This could result in logs such as:

access_fsi_mem(): address 0x002820, data: 0x00000000 sta: 0x41000001
access_fsi_mem(): address 0x002804, data: 0x00000000 sta: 0x12000000

vs

access_fsi_mem(): address 0x002820, data: 0x00000000 sta: 0x41000001
access_fsi_mem(): address 0x002804, data: 0x04c04000 sta: 0x41000001

As a result, the CPU often failed to start.

Edited by Evan Lojewski

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