[AArch64] Adding features of ID_AA64PFR1_EL1 #76

Job	Run time
Build on debian-testing amd64	1m 34s
Build on debian-10-buster amd64	42s
Build on ubuntu-rolling amd64	1m 13s
Build on ubuntu-16.04-xenial amd64	1m 6s
Build on ubuntu-14.04-lucid amd64	1m 3s
Build on alpine-latest amd64	45s
Build on debian-testing aarch64	13m 5s
Build on debian-10-buster aarch64	2m 11s
Build on ubuntu-rolling aarch64	3m 55s
Build on ubuntu-16.04-xenial aarch64	2m 37s
Build on ubuntu-14.04-trusty aarch64	2m 20s
Build on alpine-latest aarch64	1m 42s
	32m 13s

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