* term/i386/pc/vga_text.c (grub_console_cls): Use
grub_console_gotoxy() to go back to beginning of the screen.
Found by Patrick Georgi <patrick.georgi@coresystems.de>
* kern/i386/linuxbios/init.c: Put "void" to all function
declarations with no arguments.
* kern/powerpc/ieee1275/init.c: Likewise.
* term/i386/pc/at_keyboard.c: Likewise.
* term/i386/pc/vga_text.c: Likewise.
* util/grub-mkdevicemap.c: Likewise.
* term/i386/pc/vga_text.c: Include <grub/cpu/io.h>.
(CRTC_ADDR_PORT): New macro.
(CRTC_DATA_PORT): Likewise.
(CRTC_CURSOR): Likewise.
(CRTC_CURSOR_ADDR_HIGH): Likewise.
(CRTC_CURSOR_ADDR_LOW): Likewise.
(update_cursor): New function.
(grub_console_real_putchar): Call `update_cursor'.
(grub_console_gotoxy): Likewise.
(grub_console_cls): Set the default color when clearing the
screen.
(grub_console_setcursor): Implemented.
