ASoC: SOF: Intel: hda: Correct the ROM/FW state reporting code

The FSR (Firmware State Register) can be found at offset 0 in the SRAM and
it is holding information about the state of the ROM/FW.
In case of a boot failure it can be used to get the state where the boot
process got stuck, it does not itself contains error codes as such.

The error code (or the firmware state information) is stored in the next
soft register at offset 0x4.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220712125734.30512-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>