slippy: Update interrupt routing

The SerialIO devices have specific requirements for PCI
interrupt mode to use PIRQ{E,F,G,H} that are not being met.

D21:F0 uses PIRQE, which must not be shared with other PCH
D21:F1-F6 share PIRQF, which must not be shared with other PCH
D23:F0 uses PIRQH, which must not be shared with other PCH

- Fix D20IR -> D20IP typo
- Remove D25/EHCI2 as it does not exist
- Reorder other interrupts to clear PIRQE/PIRQF/PIRQH

Check device interrupts in the kernel

0:      IO-APIC-edge    timer
1:      IO-APIC-edge    i8042
8:      IO-APIC-edge    rtc0
9:      IO-APIC-fasteoi acpi
16:     IO-APIC-fasteoi ath9k
18:     IO-APIC-fasteoi i801_smbus
19:     IO-APIC-fasteoi ehci_hcd:usb1
21:     IO-APIC-fasteoi i2c-designware-pci--1, i2c-designware-pci--1
40:     PCI-MSI-edge    PCIe PME
41:     PCI-MSI-edge    i915
42:     PCI-MSI-edge    ahci
43:     PCI-MSI-edge    xhci_hcd
44:     PCI-MSI-edge    snd_hda_intel

Change-Id: Id4c08d11d2860f270c6387138acdc7d3d83a85b5
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/56028
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4176
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2 files changed