Rename nand.h as flash/nand/core.h, chase consumers. The public APIs
need to be sorted out with imp.h, but this allows other changes to
begin improving the separation between policy and mechanism.
Moves #include <target/target.h> and #include "driver.h" into the
internal headers or source files, removing it from <flash/nand/core.h>.
Changes from the flat namespace to heirarchical one. Instead of writing:
#include "nand.h"
the following form should be used.
#include <flash/nand.h>
The exception is from .c files in the same directory.
Spencer Oliver
Antonio Borneo
Zachary T Welch