[PATCH] spi: spi-mem: Add missing kdoc argument

[Miquel Raynal]

The "*mem" pointer has been added without description, describe it in
the kdoc comment in order to fix the following W=1 warning:

Warning: drivers/spi/spi-mem.c:594 function parameter 'mem' not
described in 'spi_mem_calc_op_duration'

Fixes: a11a51896572 ("spi: spi-mem: Take into account the actual maximum frequency")
Reported-by: kernel test robot <lkp at intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202507310409.fnuQ21qb-lkp@intel.com/
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 drivers/spi/spi-mem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index d3b7e857b377..841b0995c8ea 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -577,6 +577,7 @@ EXPORT_SYMBOL_GPL(spi_mem_adjust_op_freq);
  * spi_mem_calc_op_duration() - Derives the theoretical length (in ns) of an
  *			        operation. This helps finding the best variant
  *			        among a list of possible choices.
+ * @mem: the SPI memory
  * @op: the operation to benchmark
  *
  * Some chips have per-op frequency limitations, PCBs usually have their own
-- 
2.50.1