aarch64: add HWCAP2 flags from linux v5.2
tree641519b43b5877c6f7fef04a26d4eebeb53506d8
-rw-r--r-- 61 .gitignore
-rw-r--r-- 6072 COPYRIGHT
-rw-r--r-- 6630 INSTALL
-rw-r--r-- 7373 Makefile
-rw-r--r-- 1028 README
-rw-r--r-- 7 VERSION
-rw-r--r-- 81840 WHATSNEW
drwxr-xr-x - arch
-rwxr-xr-x 23962 configure
drwxr-xr-x - crt
drwxr-xr-x - dist
-rw-r--r-- 411 dynamic.list
drwxr-xr-x - include
drwxr-xr-x - ldso
drwxr-xr-x - src
drwxr-xr-x - tools