[BLOCK] Move all core block layer code to new block/ directory

drivers/block/ is right now a mix of core and driver parts. Lets move
the core parts to a new top level directory. Al will move the fs/
related block parts to block/ next.

Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/block/Kconfig b/block/Kconfig
new file mode 100644
index 0000000..eb48edb
--- /dev/null
+++ b/block/Kconfig
@@ -0,0 +1,14 @@
+#
+# Block layer core configuration
+#
+#XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
+#for instance.
+config LBD
+	bool "Support for Large Block Devices"
+	depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
+	help
+	  Say Y here if you want to attach large (bigger than 2TB) discs to
+	  your machine, or if you want to have a raid or loopback device
+	  bigger than 2TB.  Otherwise say N.
+
+source block/Kconfig.iosched