- X86 cpuid feature list dump was using the wrong array and walking off
the end of one.
- GICv2 code had a left shift by up to 31 of an integer. Needs to be
unsigned.
- PLIC same as GIC code.
- fdtwalker code should be using a bytewise accessor based helper
function for reading large integers out of an unaliged FDT.
- PCI BIOS32 search code could do a 32bit unaligned read of a string,
switch to using memcmp.
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