video: kconfig: Fix wrong text for the PCI default FB size

There is an example in the VIDEO_PCI_DEFAULT_FB_SIZE help text to
tell people how to calculate its value but the resolution given
does not match the value. Fix it.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed