Fix build problems on i386-ieee1275 and *-efi (introduced by vga_text
split).
* include/grub/i386/pc/console.h: Include `<grub/i386/vga_common.h>'.
(grub_console_cur_color, grub_console_real_putchar)
(grub_console_putchar, grub_console_getcharwidth, grub_console_getwh)
(grub_console_setcolorstate, grub_console_setcolor)
(grub_console_getcolor): Move from here ...
* include/grub/i386/vga_common.h: ... to here (new file).
* term/i386/pc/vga_text.c: Replace `<grub/machine/console.h>' with
`<grub/i386/vga_common.h>' and `<grub/cpu/io.h>' with
`<grub/i386/io.h>'.
* term/i386/vga_common.c: Replace `<grub/machine/console.h>' with
`<grub/i386/vga_common.h>'.
* conf/i386-pc.rmk (kernel_img_SOURCES): Add `term/i386/vga_common.c'.
* conf/i386.rmk (pkglib_MODULES): Add `vga_text.mod'.
(vga_text_mod_SOURCES, vga_text_mod_CFLAGS, vga_text_mod_LDFLAGS): New
variables.
* conf/i386-coreboot.rmk (kernel_elf_SOURCES): Replace
`term/i386/pc/console.c' with `term/i386/vga_common.c'.
* kern/i386/coreboot/init.c (grub_machine_init): Replace call to
grub_console_init() with call to grub_vga_text_init().
(grub_machine_fini): Replace call to
grub_console_fini() with call to grub_vga_text_fini() and
grub_at_keyboard_fini().
* include/grub/i386/pc/console.h: Include `<grub/term.h>'.
(grub_console_putchar, grub_console_getcharwidth, grub_console_getwh)
(grub_console_setcolorstate, grub_console_setcolor)
(grub_console_getcolor): New function prototypes.
* term/i386/pc/vga_text.c: Include `<grub/dl.h>'.
(grub_vga_text_getxy, grub_vga_text_gotoxy, grub_vga_text_cls)
(grub_vga_text_setcursor): Static-ize.
(grub_vga_text_term): New structure.
(GRUB_MOD_INIT(vga_text), GRUB_MOD_FINI(vga_text)): New functions.
* term/i386/pc/console.c: Remove `<grub/machine/machine.h>'.
(grub_console_cur_color, grub_console_standard_color)
(grub_console_normal_color, grub_console_highlight_color)
(map_char, grub_console_putchar, grub_console_getcharwidth)
(grub_console_getwh, grub_console_setcolorstate, grub_console_setcolor)
(grub_console_getcolor): Move from here ...
* term/i386/vga_common.c: ... to here (same function names).
