SAMV7 HSCMI: Don't assert of the data buffer is unaligned.  Instead, return -EFAULT.  This will allow the FAT file system to utilize the CONFIG_FAT_DMAMEMORY option and fix the problem from the file system

LPC43xx: Add RS485 configuration settings to Kconfig; For RS485, add an option to select DTR as the DIR pin

sim SMP:  CPU0 should not be the main thread.  That introduces an asymmetry since the main thread has no pthread_t ID.  Instead, start an additional pthread for CPU0.  The main thread will just wait and do nothing in this case