arch/arm/src/max326xx: Fixes for GPIO configuration problems and serial driver problems. I now get the NuttShell prompt (if I also band on ENTER to force all of the characters out). Progress, but not yet ready.
configs/max32660-evsys: Support CONFIG_BOOT_RUNFROMISRAM=y.
Squashed commit of the following:
arch/arm/src/max326xx and configs/max32660-evsys/nsh/defconfig: Work out some issues related to MAX326xx configuration.
configs/max32660-evsys: Add unverified board support framework.