[PATCH] tty/serial: atmel: remove cache when unnecessary

[Alexandre Belloni]

struct cache is only used in suspend/resume. Exclude it when PM is not
selected.

Suggested-by: Richard Genoud <richard.gen...@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.bell...@free-electrons.com>
---
 drivers/tty/serial/atmel_serial.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/atmel_serial.c 
b/drivers/tty/serial/atmel_serial.c
index dcebb28ffbc4..f0d4894267c2 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -175,6 +175,7 @@ struct atmel_uart_port {
        unsigned int            pending_status;
        spinlock_t              lock_suspended;
 
+#ifdef CONFIG_PM
        struct {
                u32             cr;
                u32             mr;
@@ -185,6 +186,7 @@ struct atmel_uart_port {
                u32             fmr;
                u32             fimr;
        } cache;
+#endif
 
        int (*prepare_rx)(struct uart_port *port);
        int (*prepare_tx)(struct uart_port *port);
-- 
2.11.0