[coreboot] [PATCH] [libpayload] VGA driver cursor placement and scrolling fixes

[Jonathan A. Kollasch]

* Make cursor positioning work by using both halves of the
   VGA cursor position register.

* Have vga_scroll_up() and vga_clear_line() present row/column
   arguments to the VIDEO() macro in the right order.

Signed-off-by: Jonathan A. Kollasch

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