usb: gadget: composite: Fix a bug in delayed status handling

The SET_CONFIGURATION control request's status phase is delayed
till the new config change is handled by the file-storage thread.
If the cable is disconnected or the bus is reset before the
previous config is handled, then composite driver is not notified
about the delayed status.  As a result of which, the delayed_status
field of composite device structure remains non-zero.  The status
phase of next SET_CONFIGURATION control request is not sent.
This makes the gadget unusable.

Calling usb_composite_setup_continue() after the disconnect or reset
does not make any sense.  If the host sends another control request
before the status phase of the previous control request is sent, the
delayed_status must be reset to zero.  This is not straight forward
as the UDC handles some control requests without delegating them to
the composite driver.  A simple fix would be resetting the delayed
status value after the disconnect/reset.

CRs-Fixed: 501527
Change-Id: I67c832afc88c9e7d025247e539b7223fd83644d7
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
 mfd: ab8500-gpadc: Add CONFIG_PM_SLEEP to suspend/resume

Add CONFIG_PM_SLEEP to suspend/resume functions to fix the build
warnings when CONFIG_PM_SLEEP is not selected. This is because
sleep PM callbacks defined by SET_SYSTEM_SLEEP_PM_OPS are only used
when the CONFIG_PM_SLEEP is enabled.

drivers/mfd/ab8500-gpadc.c:891:12: warning: 'ab8500_gpadc_suspend' defined but not used [-Wunused-function]
drivers/mfd/ab8500-gpadc.c:903:12: warning: 'ab8500_gpadc_resume' defined but not used [-Wunused-function]

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>