Cubieboard2 support

[Matt Thomas <matt%3am-software.com@localhost>]

is getting closer to working.  enabling ohci causes a panic so it commented out.
the nand still needs a driver.  the sdmmc controller is not sdhc compatible

## Booting kernel from Legacy Image at 50000000 ...
   Image Name:   NetBSD/cubie 6.99.23
   Created:      2013-09-07   2:30:51 UTC
   Image Type:   ARM NetBSD Kernel Image (gzip compressed)
   Data Size:    2141999 Bytes = 2 MiB
   Load Address: 40007800
   Entry Point:  40007800
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Transferring control to NetBSD stage-2 loader (at address 40007800) ...
Early console started

uboot arg = 0x7fe63fe0, 0, 0x7ffb6754, 0x7ffb6754
initarm: cbar=0x1c80000
[ Kernel symbol table missing! ]
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 6.99.23 (CUBIEBOARD)
total memory = 1024 MB
avail memory = 999 MB
mainbus0 (root)
cpu0 at mainbus0 core 0: 960 MHz Cortex-A7 r0p4 (Cortex V7A core)
cpu0: DC enabled IC enabled WB disabled EABT branch prediction enabled
cpu0: 32KB/32B 2-way L1 Instruction cache
cpu0: 32KB/64B 4-way write-back-locking-C L1 Data cache
cpu0: 256KB/64B 8-way write-through L2 Unified cache
vfp0 at cpu0: NEON MPE (VFP 3.0+)
armperiph0 at mainbus0
armgic0 at armperiph0: Generic Interrupt Controller, 160 sources (151 valid)
armgic0: 32 Priorities, 128 SPIs, 7 PPIs, 16 SGIs
armgtmr0 at armperiph0: ARMv7 Generic 64-bit Timer (24000 kHz)
armgtmr0: interrupting on irq 27
awinio0 at mainbus0
awingpio0 at awinio0
com0 at awinio0 port 0: ns16550a, working fifo
com0: console
awinwdt0 at awinio0: default period is 10 seconds
awinusb0 at awinio0 port 0
ehci0 at awinusb0: ECHI USB controller
ehci0: ohci or uhci probably not configured
usb0 at ehci0: USB revision 2.0
ehci0: interrupting on irq 71
awinusb1 at awinio0 port 1
ehci1 at awinusb1: ECHI USB controller
ehci1: ohci or uhci probably not configured
usb1 at ehci1: USB revision 2.0
ehci1: interrupting on irq 72
ahcisata0 at awinio0: AHCI SATA controller
ahcisata0: interrupting on irq 88
ahcisata0: AHCI revision 1.10, 1 ports, 32 slots, CAP 
0x6726ff80<CCCS,PSC,SSC,PMD,SPM,SAM,ISS=0x2=Gen2,SCLO,SAL,SALP,SSNTF,SNCQ>
awiniic0 at awinio0 port 0: Marvell TWSI controller
awiniic0: interrupting on irq 39
iic0 at awiniic0: I2C bus
awinfe0 at awinio0
awinge0 at awinio0
uhub0 at usb0: Allwinner EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub1 at usb1: Allwinner EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
boot device: <unknown>
root device: