COMMON : - Rename graphic card driver assembly source code files.
         - Directly program CRT controller in graphic/text mode in Hercules Graphic Card Driver.
         - Move graph_seg to its driver files.
         - Remove unused functions from graphic driver.
         - Fix extending jump warnings.

Signed-off-by: Khral Steelforge <garuda2550@gmail.com>
COMMON :  - Minor optimization.
          - Code style.

Signed-off-by: Khral Steelforge <garuda2550@gmail.com>
COMMON : Leading space to tab.

Signed-off-by: Khral Steelforge <garuda2550@gmail.com>