WORKAROUND: usb: cdns3: Restore onchip memory reservation

WORKAROUND: usb: cdns3: Restore onchip memory reservation

Restore onchip meory reservation of disable in_ep when hw
configuration is not done as a workaround.
Without restoring, disabling and re-enabling eps causes
check failure of onchip memory reseration size.

This fixes usb communication failure of ffs_func_set_alt()
calling usb_ep_disable() and usb_ep_enable() for all ep.

Note: for non workaround, it should calculate exact reservation
size from ep type and usb speed and should restore out_ep memory
reservation when there is no more enabled out_ep.

Change-Id: Ifca0052f96fd777036e01b9ddb7ae6af54bba911
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>