wireless/ieee802154: Starts structuring transmission completion handling

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

wireless/ieee802154: Removes uneccessary structs surrounding bit-fields in mac802154.c

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

Ieee802154

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

wireless/ieee802154: Simplifies MAC callback interface.  Adds missing data type definitions

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

stm32:stm32_serial fixed warning

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

wireless/ieee802154: Lots of small fixes to eliminate build issues.

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

Kinetis:Fixed warning

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

Generally cleans things up and fixes lots of small issues preventing a successful build.  Does not completely build, but there are significantly less errors

STM32F0:  The STM32F2 does not have use alternate function groupings as does the F1.  Rather, it is like other members of the STM32 family with An alternate setting AF0-AF7 for each pin.

Move: CONFIG_ADC_NO_START_CONV from drivers/adc/Kconfig to arch/arm/src/stm32[f7]/Kconfig as STM32[F7]_ADC_NO_START_CONV.  Refresh all configurations with any reference to CONFIG_ADC_NO_START_CONV.

STM32F7: warn if no DMA2 configured when using ADC with DMA.  Also correct ADC channel numbers that DMA callback passes to upper half driver.