acpi: support fixed power button event in command line

Support injecting an ACPI fixed power button event using "powerbtn" in
the command line.

BUG=b:199383670
TEST=boot Linux kernel and trigger a power button event

Change-Id: I5ed57f533fa3d91043491fd1f0695223a139fc7a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3350492
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Tomasz Nowicki <tnowicki@google.com>
diff --git a/src/linux/mod.rs b/src/linux/mod.rs
index 4af604c..039d2fd 100644
--- a/src/linux/mod.rs
+++ b/src/linux/mod.rs
@@ -1856,6 +1856,7 @@
                                             balloon_host_tube.as_ref(),
                                             &mut balloon_stats_id,
                                             disk_host_tubes,
+                                            &mut linux.pm,
                                             #[cfg(feature = "usb")]
                                             Some(&usb_control_tube),
                                             #[cfg(not(feature = "usb"))]