x86_64: call set_lint() for BIOS as well
x86_64: call set_lint() for BIOS as well

This configures the IRQ chip and is not called anywhere else for the
normal BIOS path, so it should be moved above the `if has_bios` check.

BUG=b:237095693
TEST=crosvm run --bios u-boot.rom --disk test.img # virtio-blk works

Change-Id: I1813d59d7921a824c46a49de98d272f639cc5c07
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3723801
Reviewed-by: Steven Richman <9ff8969a2d85b836b03e2518a90902a3a4dee0cf@google.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Commit-Queue: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>
Reviewed-by: Alexandre Courbot <301cd6a3ea50a894b4b51e385c5eb12b9a4ffc0c@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm