Patch merged into coreboot/master: 9c50e6a Intel BD82x6x: LPC: Unify I/O APIC setup

the following patch was just integrated into master:
commit 9c50e6a4a071a03c4dedd8eb87022644e9ee74c3
Author: Paul Menzel 
Date:   Fri May 3 12:23:39 2013 +0200

Intel BD82x6x: LPC: Unify I/O APIC setup

Remove local copies of reading and writing I/O APIC registers by
    using already available functions.

This change is similar to

commit db4f875a412e6c41f48a86a79b72465f6cd81635
        Author: Kyösti Mälkki 
        Date:   Tue Jan 31 17:24:12 2012 +0200

IOAPIC: Divide setup_ioapic() in two parts.

Reviewed-on: http://review.coreboot.org/300

and

commit e614353194c712a40aa8444a530b2062876eabe3
        Author: Kyösti Mälkki 
        Date:   Tue Feb 26 17:24:41 2013 +0200

Unify setting 82801a/b/c/d IOAPIC ID

Reviewed-on: http://review.coreboot.org/2532

and uses `io_apic_read()` and `io_apic_write()` too. Define
    `ACPI_EN` in the header file `pch.h`.

As commented by Aaron Durbin, a separate `pch_enable_acpi()` is
    not needed: “The existing code path *in this file* is about enabling
    the io apic.” [1].

[1] http://review.coreboot.org/#/c/3182/4/src/southbridge/intel/lynxpoint/lpc.c

Change-Id: I4478b1902d09061ca1db8eab6b71fef388c7a74c
    Signed-off-by: Paul Menzel 
    Reviewed-on: http://review.coreboot.org/3183
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See http://review.coreboot.org/3183 for details.

-gerrit