fonts: Add 6x10 font

This font is suitable for framebuffer consoles on devices with a
320x240 screen, to get a reasonable number of characters (53x24) that
are still at a readable size.

The font is derived from the existing 6x11 font, but gets 3 extra
lines without sacrificing readability. Also I redesigned a some glyhps
so they are more distinct and better fill the available space.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/lib/fonts/fonts.c b/lib/fonts/fonts.c
index f947189..823376c 100644
--- a/lib/fonts/fonts.c
+++ b/lib/fonts/fonts.c
@@ -63,6 +63,10 @@
 #undef NO_FONTS
     &font_mini_4x6,
 #endif
+#ifdef CONFIG_FONT_6x10
+#undef NO_FONTS
+    &font_6x10,
+#endif
 };
 
 #define num_fonts ARRAY_SIZE(fonts)