libcamera: controls: Move ControlValue size check to controls.cpp

The size of the ControlValue class is checked by a static_assert() to
avoid accidental ABI breakages. There's no need to perform the check
every time controls.h is included, move it to controls.cpp.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

include/libcamera/controls.h

@@ -188,8 +188,6 @@ private:
 		 std::size_t numElements, std::size_t elementSize);
 };
 
-static_assert(sizeof(ControlValue) == 16, "Invalid size of ControlValue class");
-
 class ControlId
 {
 public: