target/hppa: Update SeaBIOS-hppa to version 16

SeaBIOS-hppa version 16 news & enhancements:

- Initial 64-bit firmware release
- Added fault handler to catch and report firmware bugs
- Use Qemu's bu

target/hppa: Update SeaBIOS-hppa to version 16

SeaBIOS-hppa version 16 news & enhancements:

- Initial 64-bit firmware release
- Added fault handler to catch and report firmware bugs
- Use Qemu's builtin_console_out() via diag 0x101
- parisc-qemu-install Makefile target to install firmware in qemu
- Added -fw_cfg opt/OS64,string=3 option

Fixes:

- Avoid crash when booting without SCSI controller
- Avoid possible crashes while detecting LASI LAN & graphics
- Don't check layers in PDC_MEM_MAP_HPA, fixes NetBSD
- Ensure cache definition does not trigger endless loops
- Mark B160L as 32-bit machine in inventory

Signed-off-by: Helge Deller <deller@gmx.de>
Acked-by: Richard Henderson <richard.henderson@linaro.org>

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