Spirit:  Add more debug output.  Make sure device is in READY state after reset and before changing to STANDBY.

NX PR

Approved-by: Gregory Nutt <gnutt@nuttx.org>

stm32f746g-disco:  Make the initialization logic identical to the standard way that is done for all other board.

STM32F7:  Fix for coding standard violations that came in with cd3ca114 -- missed a file last time

STM32F7:  Fix for coding standard violations that came in with cd3ca114

IoT Board/Spirit:  Fix a few issues that interfered with testing.  Move console to the VCOM port (USART) for all configurations.  Rename the spirit-mac configuration to spirit-6lowpan.  Add lots of debug output the spirit network driver.

Bug fixes for STM32F769

Approved-by: Gregory Nutt <gnutt@nuttx.org>

STM32_RCC_DCKCFGR2 has nothing to do with PLLI2S; PLLI2S is not dependent on LTDC, instead on SAICLK1/2 generated from PLLI2S

network: Move USRSOCK specific code from from inet_sockif to usrsock_sockif:  Add file missed in last commit

STM32L4 PWR: correct PWR_SR2 REGLPS and REGLPF bits, add port I registers.  Also remove duplicate section from Kconfig

commit f97da3a546f9d6e1b858cfc45538a06b62396034
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Sun Jul 30 19:09:46 2017 -0600

    Network: Condition out some types that depend on definitions that are only available with 6LoWPAN is enabled.

commit 312e9dc1195527100e12bf6be8b629f5b29be1f6
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Sun Jul 30 18:57:23 2017 -0600

    6LoWPAN: Fix case where source and destination IP address were backward.  Fix some compile issues when star topology support is enabled.

commit 3b0e71c5807194fbb006d0560bb2c98133055ba3
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Sun Jul 30 16:01:48 2017 -0600

    6LoWPAN PktRadio:  Finishes up all logic; Lots of misc changes from build testing.

commit cc118f8cb335e1c48354fd7112e20be57de50b68
Author: Gregory Nutt <gnutt@nuttx.org>
Date:   Sun Jul 30 12:41:18 2017 -0600

    6LoWPAN: Remove explicate type struct ieee802154_frame_meta_s from derive interface methods.  Replace with a opaque void * type s...

To use an external oscillator module (not just a crystal) with the STM32F4, one needs to enable the HSEBYP bit in the RCC_CR register. This change allows an integrator to define STM32_RCC_CR_HSEBYP in their board.h file if they want this configuration.