[roll] Roll fuchsia [input][virtio] Migrate to zx_system_get_page_size

Migrates usages of page size constants to zx_system_get_page_size

Original-Bug: 67899

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/498000
Original-Revision: ec764c1df7f2b98fa58772b8af9f6b90cb60404b
GitOrigin-RevId: 2ab2c655756684fd741c859bdaba2f9001c6c0ef
Change-Id: Ibcf61a611a9cca49f41e44398172399dc9b4055f
diff --git a/stem b/stem
index cebbf8b..4691c0a 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="0e4ef215e18aa19542f3e72402072e881478cb1b"/>
+             revision="ec764c1df7f2b98fa58772b8af9f6b90cb60404b"/>
   </projects>
   <hooks>
     <hook name="install-environment"