update seabios submodule to 1.16.2

git shortlog rel-1.16.1..rel-1.16.2
-----------------------------------

David Woodhouse (1):
      xen: require Xen info structure at 0x1000 to detect Xen

Qi Zhou (1):
      usb: fix wrong init of keyboard/mouse's if first interface is not boot protocol

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/roms/seabios b/roms/seabios
index 3208b098f51a9ef96d0dfa71d5ec3a3eaec88f0a..ea1b7a0733906b8425d948ae94fba63c32b1d425 160000 (submodule)
--- a/roms/seabios
+++ b/roms/seabios
@@ -1 +1 @@
-Subproject commit 3208b098f51a9ef96d0dfa71d5ec3a3eaec88f0a
+Subproject commit ea1b7a0733906b8425d948ae94fba63c32b1d425