[PATCH v3] spi: spi-cadence: Add missing kernel doc for clk_rate in cdns_spi

[Charles Keepax <ckeepax@opensource.cirrus.com>]

Add the missing kernel documentation to silence the build warning.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---

Just splitting the patch out to fix my omitting v2 in the title.

Thanks,
Charles

 drivers/spi/spi-cadence.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c
index 26e6633693196..de8fe3c5becbb 100644
--- a/drivers/spi/spi-cadence.c
+++ b/drivers/spi/spi-cadence.c
@@ -102,6 +102,7 @@
  * @regs:		Virtual address of the SPI controller registers
  * @ref_clk:		Pointer to the peripheral clock
  * @pclk:		Pointer to the APB clock
+ * @clk_rate:		Reference clock frequency, taken from @ref_clk
  * @speed_hz:		Current SPI bus clock speed in Hz
  * @txbuf:		Pointer	to the TX buffer
  * @rxbuf:		Pointer to the RX buffer
-- 
2.30.2