seabios: update to 1.7.2 release

Not that many changes as we have a pretty recent git snapshot in master
already:

Hannes Reinecke (1):
      megasas: Invert PCI device selection

Kevin O'Connor (2):
      Minor: Separate UUID display from F12 boot prompt.
      boot: Support "halt" in the boot order to prevent default boot attempts.

Laszlo Ersek (1):
      display_uuid(): fix incomplete check after the loop

Paolo Bonzini (1):
      vgabios: implement AX=1120H..1124H functions

roms/seabios

@@ -1 +1 @@
-Subproject commit a810e4e72a0d42c7bc04eda57382f8e019add901
+Subproject commit 4bd8aebf3534e10d9aa21e820903f2cf9120708c