[VIRT-343 # ARMv8.5-RNG, Random Number Generator ]

Three versions posted, with good review on the crypto side. Generalized our existing infrastructure to use crypto quality numbers by default, and decent deterministic numbers when given the -seed command-line argument. Converted our existing hw random number devices; implemented the AA64 registers; filled in the PPC64 stubs; implemented the X86 tcg insns.

[VIRT-327 # Richard's upstream QEMU work ]

Reviewed and revised some target/hppa patches from Sven. Final pull request for hppa for 4.0. Final pull request for decodetree. Revised the tcg extract2 patch set; delay this for 4.1.

r~