kexts: fbcon: add 8x16 bitmap font

kexts/drivers/tty/fbcon/u_vga16.h

@@ -0,0 +1,15 @@
+#ifndef U_VGA16_H_
+#define U_VGA16_H_
+
+struct bitmap_font {
+	unsigned char Width;		///< max. character width
+	unsigned char Height;		///< character height
+	unsigned short Chars;		///< number of characters in font
+	const unsigned char *Widths;	///< width of each character
+	const unsigned short *Index;	///< encoding to character index
+	const unsigned char *Bitmap;	///< bitmap of all characters
+};
+
+extern const struct bitmap_font fbcon_font;
+
+#endif