target/hppa: Update SeaBIOS-hppa to version 22

The new firmware includes support for an A400-44 machine with initial functional 64-bit PAT PDC support: - Linux 64-bit kernel runs nicely. - ODE 2006 works nicely on 715, B160L, and A400, but has problems on C3700. - MPE and 64-bit HP-UX11 need more work, although HP-UX11 boot up to a crash where it reports where it had problems. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Anton Johansson <anjo@rev.ng>