The video cursor is always enabled at present, but it is only used for
expo. Put it behind an option, to reduce code size for platforms which
do use video but don't want a cursor.
Move the existing set_cursor_visible() method behind this option, for
the normal console. For the truetype console, the fonts and extra
rendering dwarf the code-size saving, so include the cursor there
always.
Once the cursor is enabled for the CLI, this will produce code-size
savings.
Signed-off-by: Simon Glass <sjg@chromium.org>
2986bf7bcb