libcamera: base: shared_fd: Rename fd() to get()

For consistency with UniqueFD, rename the fd() function to get().
Renaming UniqueFD::get() to fd() would have been another option, but was
rejected to keep as close as possible to the std::shared_ptr<> and
std::unique_ptr<> APIs.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>

src/gstreamer/gstlibcameraallocator.cpp

@@ -52,7 +52,7 @@ FrameWrap::FrameWrap(GstAllocator *allocator, FrameBuffer *buffer,
 	  outstandingPlanes_(0)
 {
 	for (const FrameBuffer::Plane &plane : buffer->planes()) {
-		GstMemory *mem = gst_fd_allocator_alloc(allocator, plane.fd.fd(),
+		GstMemory *mem = gst_fd_allocator_alloc(allocator, plane.fd.get(),
 							plane.offset + plane.length,
 							GST_FD_MEMORY_FLAG_DONT_CLOSE);
 		gst_memory_resize(mem, plane.offset, plane.length);