Soft link: Change how a value is returned so that _inode_linktarget will function in all of its use contexts.

Soft links:  Eliminate in-stack allocation of path working buffer needed for traversal fo paths with soft links.

Add macros support that will eventually allow dynamic allocation of strings need to support soft links.

tools/noteinfo.c: A hack tool that I use to analyze some sched_note output.  Needs a home and may be useful to others.

inode_find:  Now takes struct inode_desc_s type as input.  This was necessary before that structure includes some data storage.  It was used within inode_find(), but that means that the life of the data was the life of inode_find().  That data must persist longer.  It is now provided by the caller so that the life of the data persists for the entire life of the caller.

FS: Remove inode_search_nofollow().  That logic is no handled with a new field in the input argument structure.

Soft links: Fix logic and remove kludge of last commit.  Rename inode_dereference() as inode_linktarget() and make global.

FS: Separate inode_search() and inode_free() from fs_inode.c and put in separate files.  Flesh out symbolic link logic in stat() and readdir().  There are still some issues with stat().

STM32F429-DISCO:  Move some board initialization logic that is not usuable because it lacks the configuration options to make it so

STM32F7 SDMMC: Make sure that all SDMMC configuration variables begin with STM32F7_; Eliminate CONFIG_SDMMC1/2_DMA altogether.  Does not appear to be used.

Timer logic: Add private function prototypes to eliminate a warning; Functions should not be inline because the may recurse.

STM32F103-Minimum:  Fix a compile error.  CONFIG_STM32_TICKLESS_ONESHOT_TIMER is only defined in TICKLESS mode.  Somebody has been hand editing .config files.