Kconfig: Move libhwbase related options into lib/Kconfig

More will follow so better move them where they are used. Also remove
defaults and add dependencies to not clutter .config files up that
don't have any of these options selected.

Change-Id: I3a255c821cc26aeb66e4fd6adf7142d7e856f5ac
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/20625
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/lib/Kconfig b/src/lib/Kconfig
index 6d5f034..a1034a9 100644
--- a/src/lib/Kconfig
+++ b/src/lib/Kconfig
@@ -5,3 +5,21 @@
 	  Don't include default fill_lb_framebuffer() implementation. Select
 	  this if your drivers uses MAINBOARD_DO_NATIVE_VGA_INIT but provides
 	  its own fill_lb_framebuffer() implementation.
+
+config RAMSTAGE_ADA
+	bool
+	help
+	  Selected by features that use Ada code in ramstage.
+
+config RAMSTAGE_LIBHWBASE
+	bool
+	select RAMSTAGE_ADA
+	help
+	  Selected by features that require `libhwbase` in ramstage.
+
+if RAMSTAGE_LIBHWBASE
+
+config HWBASE_DYNAMIC_MMIO
+	def_bool y
+
+endif