kernel/arm: reserve interrupts for GICv2

This works similarly on the 32-bit and 64-bit ARM port.

Other architectures call reserve_io_interrupt_vectors() when
initializing the interrupt controller (e.g. PIC, APIC etc.)
so let's do the same on ARM.

Change-Id: If5a360cf23fd01d97d2f20702785bc5da0190052
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5566
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>

arm64: Use architectural system timer.

Change-Id: Ia31a66b2860b8b4d47583ac55053ff3aea8bb2ad
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5279
Reviewed-by: John Scipione <jscipione@gmail.com>
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

arm64: Add stubs so kernel can at least link

Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: I2476a6346c912c4aa0c26e4f3720ea2c2690b669
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1857
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>