spi: cadence: mark pm functions __maybe_unused

The newly added runtime PM support for the cadence spi driver
causes harmless warnings when PM is disabled:

drivers/spi/spi-cadence.c:681:12: warning: 'cnds_runtime_suspend' defined but not used
drivers/spi/spi-cadence.c:652:12: warning: 'cnds_runtime_resume' defined but not used

This adds __maybe_unused annotations to the respective functions
to shut up the warnings, while leaving the code in place for
compile testing and avoiding ugly #ifdefs.

Fixes: d36ccd9f7ea4 ("spi: cadence: Runtime pm adaptation")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c
index 8a0bd62a5088..1c57ce64abba 100644
--- a/drivers/spi/spi-cadence.c
+++ b/drivers/spi/spi-cadence.c
@@ -651,7 +651,7 @@ static int __maybe_unused cdns_spi_resume(struct device *dev)
  *
  * Return:      0 on success and error value on error
  */
-static int cnds_runtime_resume(struct device *dev)
+static int __maybe_unused cnds_runtime_resume(struct device *dev)
 {
         struct spi_master *master = dev_get_drvdata(dev);
         struct cdns_spi *xspi = spi_master_get_devdata(master);
@@ -680,7 +680,7 @@ static int cnds_runtime_resume(struct device *dev)
  *
  * Return:      Always 0
  */
-static int cnds_runtime_suspend(struct device *dev)
+static int __maybe_unused cnds_runtime_suspend(struct device *dev)
 {
         struct spi_master *master = dev_get_drvdata(dev);
         struct cdns_spi *xspi = spi_master_get_devdata(master);