video: fbdev: mmp: Fix kernel-doc warning for lcd_spi_write

Add missing parameter and drop parameter that is not present
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201206190247.1861316-8-sam@ravnborg.org

drivers/video/fbdev/mmp/hw/mmp_spi.c

@@ -17,8 +17,8 @@
 
 /**
  * spi_write - write command to the SPI port
+ * @spi:  the SPI device.
  * @data: can be 8/16/32-bit, MSB justified data to write.
- * @len:  data length.
  *
  * Wait bus transfer complete IRQ.
  * The caller is expected to perform the necessary locking.