audit: Filter-out unavailable AArch64 syscalls

audit: Filter-out unavailable AArch64 syscalls

AArch64 does not support all syscalls referenced by our audit rules,
so apply some filtering where appropiate.
See [1] for more information.

While at it, remove trailing white spaces where appropiate.

NOTE: AArch32 (or any other 32-bit ARM platform) syscalls were not
tested since we only target 64-bit ARM platforms.

[1] https://github.com/linux-audit/audit-userspace/issues/91

Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
Signed-off-by: Alexandru Antone <Alexandru.Antone@enea.com>
Change-Id: I5c6b7e5ebe94c7bd1aadcb2106931f21d9acf847