Comment out most of 430060e9.  Clean-up some dependencies in top-level Makefile

This reverts commit 430060e9.

That commit has some unexpected side-effects

tools/:  Add initialconfig.c so that perhaps in the future we will be able to use this to generate a new configuration from scratch (rather than having to derive new configurations from existing configurations)

usbdev composite and SAMV7-Xult: Move board-specific USB composite configuration out of boardctl.c and into board-specific logic where it belongs.  Add a configuration option to the boardctl() calls to support multiple composite device configurations dynamically.

We developed a huge Changeset over a year ago to make USB Composite configuration dynamical and be able to instanciate the CDCACM multiple times inside this device.  We use this feature to switch between one in normal and up to three CDCACMs in maintenance boot.

The control path starts in “boardctl.c” where the configuration for the device is constructed.  There are still a few issues which I’ll ask you to have a look at before this beast can be merged.

1. To be able to construct the data dynamically I have changed some USB-Structs to be packed. Maybe there are additional structs to change (just for completeness – not for current functionality).

2. I’ve added the Macro “COMPILE_TIME_ASSERTION” two times (in usbmsc_desc.c and in cdcacm_desc.c) to stay private. Maybe you’ll find a better place. It’s used to check the size of the structs against the assumptions.

3. I’ve changed the interface for some USB-Functions to receive also the dynamic configuration. Maybe this can be done more elegant.

4. The original NuttX (without the patch) seems to have problems with a Composite device holding a CDCACM and an MSC. The “USB SET CONFIGURATION” request does not to work at all. This makes the test fail under Windows and under Linux. Applying this patch doesn’t change anything – because it only changes the configuration – not the behavior. Maybe you’ll have a look at this problem before applying the patch.

nucleo-f4x1re User LEDS: Issue #51 reports compilation problems with stm32_userled.c.  Reported by Gappi92.

Tiva SSI:  Resolves issue 52 'Copy-Paste error in tiva_ssibus_initialize()' submitted by Aleksandr Kazantsev.

Makefiles.*: It should be possible to run 'make menuconfig' with no .config and no Make.defs file.  This change removes the dependency on Make.defs, but does not solve the problem of the missing .config file.  Without a .config file, it is not currently possible for the Makefile.* to correctly setup up the symbolic links to directories.

pthread robust mutexes:  Fix memmory trashing problem:  the main task may also use mutexes; need to check thread type before accessing pthread-specific mutex data structures.  Problem noted by Jussi Kivilinna.