lib: Move fonts from drivers/video/console/ to lib/fonts/

Several drivers need font support independent of CONFIG_VT, cfr. commit
9cbce8d7e1dae0744ca4f68d62aa7de18196b6f4, "console/font: Refactor font
support code selection logic").
Hence move the fonts and their support logic from drivers/video/console/ to
its own library directory lib/fonts/.
This also allows to limit processing of drivers/video/console/Makefile to
CONFIG_VT=y again.

[Kevin Hilman <khilman@linaro.org>: Update arch/arm/boot/compressed/Makefile]
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/lib/Kconfig b/lib/Kconfig
index fe01d41..0fe08ea 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -407,4 +407,6 @@
 config UCS2_STRING
         tristate
 
+source "lib/fonts/Kconfig"
+
 endmenu