drm/display: fix typo

While studying the code I've bumped into a small typo within the
kernel-doc for two functions, apparently, due to copy-paste.

This commit fixes "sizo" word to be "size".
Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Fixes: b3daa5ef ("drm: Add helper for DP++ adaptors")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240119102215.201474-1-oleksandr@natalenko.name

drivers/gpu/drm/display/drm_dp_dual_mode_helper.c

@@ -52,7 +52,7 @@
  * @adapter: I2C adapter for the DDC bus
  * @offset: register offset
  * @buffer: buffer for return data
- * @size: sizo of the buffer
+ * @size: size of the buffer
  *
  * Reads @size bytes from the DP dual mode adaptor registers
  * starting at @offset.
@@ -116,7 +116,7 @@ EXPORT_SYMBOL(drm_dp_dual_mode_read);
  * @adapter: I2C adapter for the DDC bus
  * @offset: register offset
  * @buffer: buffer for write data
- * @size: sizo of the buffer
+ * @size: size of the buffer
  *
  * Writes @size bytes to the DP dual mode adaptor registers
  * starting at @offset.