libcamera: raspberrypi: dmaheaps: Improve device open

Improve the device opening at class construction time by testing all
the available device paths and printout the appropriate error message.

While at it, initialize dmaHeapHandle_ to -1 and check for its value
at destruction time.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

0 files changed, 0 insertions, 0 deletions