parisc architecture fixes and updates for kernel v6.7-rc1:

- Add nop instructions after TLB inserts for PA8x00 CPUs
- Fix a 64-bit kernel crash in STI font routines which miscalculates
  the font start address as it gets signed vs unsigned offsets wrong
- Support building an uncompressed Linux kernel
- Simplify smp_prepare_boot_cpu() function
- Support for soft power-off in qemu
- Use 64-bit little-endian values in SBA IOMMU PDIR table for AGP
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