parisc: SEABIOS_HPPA_VERSION 23

New SeaBIOS-hppa release with various fixes for qemu-v11:
- Various fixes to support CPUs with 40 and 44 bits physical address
- Fix PAT_CPU call when asking for current CPU
- Add function to stop CPU in PDC_PROC
- Prevent execution of some functions when running as PAT firmware
- Add HP rp2470 (A500-6X) machine description
- Tune cache parameters to speed up cache flushes in operating systems
- Use Wide SCSI mode on 64-bit
- Allow callling PDC_MODEL_GET_PLATFORM_INFO
- Revert resetting LSI SCSI with ODE on HP3000

Signed-off-by: Helge Deller <deller@gmx.de>