struct cache is only used in suspend/resume. Exclude it when PM is not
selected.
Suggested-by: NRichard Genoud <richard.genoud@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: NRichard Genoud <richard.genoud@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>