lcd: rename console_(row|col)

Rename console_(row|col) to console_curr_(row|col) to better distinguish
it from console_(rows|cols).

This is a preparatory step for extracting lcd console code into its own file.

Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Simon Glass <sjg@chromium.org>
Cc: Anatolij Gustschin <agust@denx.de>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>