libcamera: swstats_cpu: Drop patternSize_ documentation

patternSize_ is a private variable and its meaning is already documented
in the patternSize() getter documentation.

Move the list of valid sizes to the patternSize() getter documentation
and drop the patternSize_ documentation.

While at it also add 1x1 as valid size for use with future support
of single plane non Bayer input data.

Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/software_isp/swstats_cpu.cpp

@@ -58,6 +58,8 @@ namespace libcamera {
  * also indicates if processLine2() should be called or not.
  * This may only be called after a successful configure() call.
  *
+ * Valid sizes are: 1x1, 2x2, 4x2 or 4x4.
+ *
  * \return The pattern size
  */
 
@@ -133,13 +135,6 @@ namespace libcamera {
  * \brief Statistics window, set by setWindow(), used every line
  */
 
-/**
- * \var Size SwStatsCpu::patternSize_
- * \brief The size of the bayer pattern
- *
- * Valid sizes are: 2x2, 4x2 or 4x4.
- */
-
 /**
  * \var unsigned int SwStatsCpu::xShift_
  * \brief The offset of x, applied to window_.x for bayer variants