stm32:stm32_serial fixed warning

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

Kinetis:Fixed warning

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

enable GMSK

explicit that ASK/OOK is not supported yet
set msk phase shift duration when selecting msk

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.

add settings to set default freq at boot
more cc1101 config

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.

Move enabling of GPIO peripherals form UART setup to clockconfig.  This is not a UART function.  It is needed by all periphrals.