mfd: rk808: Mark pm functions __maybe_unused

The newly added suspend/resume functions are only used if CONFIG_PM
is enabled:

drivers/mfd/rk808.c:752:12: error: 'rk8xx_resume' defined but not used [-Werror=unused-function]
drivers/mfd/rk808.c:732:12: error: 'rk8xx_suspend' defined but not used [-Werror=unused-function]

Mark them as __maybe_unused so the compiler can silently drop them
when they are not needed.

Fixes: 586c1b4125b3 ("mfd: rk808: Add RK817 and RK809 support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index 601cefb5c9d8..9a9e6315ba46 100644
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -729,7 +729,7 @@ static int rk808_remove(struct i2c_client *client)
         return 0;
 }
 
-static int rk8xx_suspend(struct device *dev)
+static int __maybe_unused rk8xx_suspend(struct device *dev)
 {
         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
         int ret = 0;
@@ -749,7 +749,7 @@ static int rk8xx_suspend(struct device *dev)
         return ret;
 }
 
-static int rk8xx_resume(struct device *dev)
+static int __maybe_unused rk8xx_resume(struct device *dev)
 {
         struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
         int ret = 0;