Merge tag 'hppa-serial-fix-pull-request' of https://github.com/hdeller/qemu-hppa...

hppa: Fix serial port pass-through

This series fixes the SeaBIOS-hppa firmware and the serial ports setup code in
qemu so that it reflects the real hardware and allows serial port pass-through
from the host to guests.

Tested with Linux guests.

v2: Changes suggested by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
- Split out hppa_hardware.h restoration to an own patch
- Drop unneccesary checks for serial_hd(x)

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
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# gpg: Signature made Sat 28 May 2022 03:28:04 AM PDT
# gpg:                using EDDSA key BCE9123E1AD29F07C049BBDEF712B510A23A0F5F
# gpg: Good signature from "Helge Deller <deller@gmx.de>" [unknown]
# gpg:                 aka "Helge Deller <deller@kernel.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 4544 8228 2CD9 10DB EF3D  25F8 3E5F 3D04 A7A2 4603
#      Subkey fingerprint: BCE9 123E 1AD2 9F07 C049  BBDE F712 B510 A23A 0F5F

* tag 'hppa-serial-fix-pull-request' of https://github.com/hdeller/qemu-hppa:
  hppa: Fix serial port assignments and pass-through
  hppa: Sync contents of hppa_hardware.h header file with SeaBIOS-hppa
  New SeaBIOS-hppa version 6

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>