usb: gadget: udc: core: Revise comments for USB ep enable/disable

The usb_ep_disable() and usb_ep_enable() routines are being widely
used in atomic/interrupt context by function drivers.  Hence, the
statement about it being able to only run in process context may
not be true.  Add an explicit comment mentioning that it can be used
in atomic context.

Change-Id: I509be3e7eba3f61b95c9bbeef6b39f4fb3a55f25
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Link: https://lore.kernel.org/r/1635365407-31337-2-git-send-email-quic_wcheng@quicinc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: b0d5d2a71641bb50cada708cc8fdca946a837e9a
Git-Repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Rohith Kollalsi <quic_rkollals@quicinc.com>