spi-mem: fix kernel-doc for spi_mem_dirmap_{read|write}()

The function names in the kernel-doc comments were mistyped, with a word
"dirmap" being repeated twice, so fix them.

Fixes: aa167f3f ("spi: spi-mem: Add a new API to support direct mapping")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-mem.c

@@ -622,7 +622,7 @@ void devm_spi_mem_dirmap_destroy(struct device *dev,
 EXPORT_SYMBOL_GPL(devm_spi_mem_dirmap_destroy);
 
 /**
- * spi_mem_dirmap_dirmap_read() - Read data through a direct mapping
+ * spi_mem_dirmap_read() - Read data through a direct mapping
  * @desc: direct mapping descriptor
  * @offs: offset to start reading from. Note that this is not an absolute
  *	  offset, but the offset within the direct mapping which already has
@@ -668,7 +668,7 @@ ssize_t spi_mem_dirmap_read(struct spi_mem_dirmap_desc *desc,
 EXPORT_SYMBOL_GPL(spi_mem_dirmap_read);
 
 /**
- * spi_mem_dirmap_dirmap_write() - Write data through a direct mapping
+ * spi_mem_dirmap_write() - Write data through a direct mapping
  * @desc: direct mapping descriptor
  * @offs: offset to start writing from. Note that this is not an absolute
  *	  offset, but the offset within the direct mapping which already has