USB: host: Atmel OHCI and EHCI drivers improvements

USB: host: Atmel OHCI and EHCI drivers improvements

Suspend/resume support for EHCI.
struct dev_pm_ops for OHCI.
Removed global variables from both.
Fixed OHCI wake up support for STANDBY(wake-up enabled) and MEM(wake-up disabled) sleep targets.

Changes since v5:
* Don't overwrite device wakeup flag with device_init_wakeup(), now using a private wakeup bool instead.

Changes since v4:
* Re-add at91_suspend_entering_slow_clock() to OHCI, we can't naively remove this one, this device needs to be continuously clocked to provide wake up support.
The removal of at91_suspend_entering_slow_clock() actually lighted up an issue on wake up support, which is now fixed.

Changes since v3:
* Using struct dev_pm_ops instead of static struct platform_driver resume and suspend bindings for both EHCI and OHCI
* Fixed inconsistency in patch subjects, _ intead of - for file names
* Patch cleaning with the help of checkpatch.pl, fixed lines over 80 characters

Changes since v2:
* Added patchs from an other submission, because this series depended on this one
* EHCI: Move global variables to private struct
* OHCI: Move global variables to private struct
* Using ohci->priv and ehci->priv instead of hcd->hcd_priv, which were not the right way to do that

Changes since v1:
* Don't use at91_suspend_entering_slow_clock() on EHCI, we are trying to get read of this of this function
* Removed at91_suspend_entering_slow_clock() from OHCI

Sylvain Rochet (6):
USB: host: ehci-atmel: Add suspend/resume support
USB: host: ohci-at91: Use struct dev_pm_ops instead of struct
platform_driver
USB: host: ehci-atmel: Move global variables to private struct
USB: host: ohci-at91: Move global variables to private struct
USB: host: ohci-at91: usb_hcd_at91_probe(), remove useless stack
initialisation
USB: host: ohci-at91: Fix wake-up support

 drivers/usb/host/ehci-atmel.c | 102 +++++++++++++++++++++++++---------
 drivers/usb/host/ohci-at91.c  | 126 ++++++++++++++++++++++++++----------------
 2 files changed, 154 insertions(+), 74 deletions(-)