Add serial init to centralize UART/LPUART management
   Use kinetis_ not up_ where arch specific
   Defined kinetis_[lp]uart_[early]serialinit to facilitate
    bring up both UARTs and LPUARTs as devices and a console

   Support ordering and merging of serial devices names.

   There was an OR where and AND NOT was needed.

Merged in w8jcik/nuttx/w8jcik/option-to-enable-memory-card-debug-outpu-1488183957218 (pull request #224)

Kconfig: memory card debug output without SDIO

Approved-by: Gregory Nutt

SAM3/4: GPIO bit numbering typo fixes.

Approved-by: Gregory Nutt

Add basic support for the STM32F334 and Nucleo F334R8 board

Approved-by: Gregory Nutt

Kinetis:  Resolve issue with duplicate definitions of up_putc.  Addition conditional logic to pick just one.

Kinetis:Add LPUART

Approved-by: Gregory Nutt

   Pin out LPUART0 for testing
   Define BOARD_SOPT2_PLLFLLSEL ti select MCGPLLCLK
   Define BOARD_SIM_CLKDIV3_FREQ etal to provide BOARD_LPUART0_FREQ