[U-Boot] 85xx platforms build broken due to flush dcache functions missing

[Marek Vasut]

Dear Zang Roy-R61911,

The patch "[PATCH V2] MPC8xxx: Define cache ops for USB" wasn't applied yet for 
some reason. It fixes the issue.

> Hi, Marek
> 
> When I build P5020DS_config with the current u-boot head, I got:
> /home/roy/CVS/upstream/u-boot/drivers/usb/host/ehci-hcd.c:346: undefined
> reference to `flush_dcache_range'
> /home/roy/CVS/upstream/u-boot/drivers/usb/host/ehci-hcd.c:348: undefined
> reference to `flush_dcache_range'
> /home/roy/CVS/upstream/u-boot/drivers/usb/host/ehci-hcd.c:349: undefined
> reference to `flush_dcache_range'
> /home/roy/CVS/upstream/u-boot/drivers/usb/host/ehci-hcd.c:372: undefined
> reference to `invalidate_dcache_range'
> /home/roy/CVS/upstream/u-boot/drivers/usb/host/ehci-hcd.c:374: undefined
> reference to `invalidate_dcache_range'
> /home/roy/CVS/upstream/u-boot/drivers/usb/host/ehci-hcd.c:376: undefined
> reference to `invalidate_dcache_range'
> /home/roy/CVS/upstream/u-boot/drivers/usb/host/ehci-hcd.c:386: undefined
> reference to `invalidate_dcache_range' make: *** [u-boot] Error 1
> 
> 
> I found it was caused by your commit :
> 
> commit b8adb12095814260d2b5edb23663ddf0ab97b877
> Author: Marek Vasut <marex at denx.de>
> Date:   Mon Apr 9 04:07:46 2012 +0200
> 
>     USB: Drop cache flush bloat in EHCI-HCD
> 
>     Discard the creepy cache flushing mechanisms in ehci-hcd.c and replace
> them more straightforward flushing. In the new approach, the flushing
> takes place directly in ehci_submit_async() call instead of going through
> the QH list an flushing all members and buffers. This discards a lot of
> weird bit operation on the members of QH and qTD structures.
> 
>     NOTE: Certainly, this flushes even qTDs which are possibly unused in
> some transactions, though the overhead of the previous code was much
> higher than the overhead of flushing two more cache lines (which most
> probably aren't ev cached).
> 
>     Signed-off-by: Marek Vasut <marek.vasut at gmail.com>
> 
> Do you have any comment? Your commit will break all 85xx platforms with USB
> controller. Thanks
> Roy

Best regards,
Marek Vasut