libcamera: file: Use Flags<> class for map flags

Use the newly introduced Flags<> class to store a bitfield of
File::MapFlag in a type-safe way.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

src/libcamera/base/file.cpp

@@ -52,6 +52,11 @@ LOG_DEFINE_CATEGORY(File)
  * the file constents
  */
 
+/**
+ * \typedef File::MapFlags
+ * \brief A bitwise combination of File::MapFlag values
+ */
+
 /**
  * \enum File::OpenMode
  * \brief Mode in which a file is opened
@@ -371,7 +376,7 @@ ssize_t File::write(const Span<const uint8_t> &data)
  *
  * \return The mapped memory on success, or an empty span otherwise
  */
-Span<uint8_t> File::map(off_t offset, ssize_t size, enum File::MapFlag flags)
+Span<uint8_t> File::map(off_t offset, ssize_t size, File::MapFlags flags)
 {
 	if (!isOpen()) {
 		error_ = -EBADF;