Add serial_priv structure to serial uclass to cache terminal dimensions.
When serial_query_size() successfully queries the terminal, store the
results in the uclass-private data for later retrieval.
This avoids repeated terminal queries and improves performance when
different subsystems need the terminal size.
Series-changes: 3
- Drop unnecessary 'dev' argument
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
0d5c9d1529