fstat(): Rethink procfs fstat().  If write method is supported, then should report file s writeable.

LPC43:  Rename HAVE_CONSOLE to HAVE_SERIAL_CONSOLE.  We can, of course, always have a some console other than a serial console.

LPC43 serial:  Correct conditional logi that selects /dev/ttySN.  Problem noted by Alan Carvalho de Assis.

Upstream kinetis

Approved-by: Gregory Nutt

   Update Console to match README.txt

procfs: When addition of memset from previous commit, it is no longer necessary to set individual fields to zero.

Upstream kinetis

Approved-by: Gregory Nutt

  Added K66 FMC register definition

   Added ALT version of RNGA, FTM2, DAC0 as a facility to later
   define secondary access via AIPS1 to these peripherals

  The K whole family line has max 4 or each. But the supported
  parts have the maximums listed below:

    K46 and K66    3 SPI SPI0-SPI2
    K46 and K66    4 I2C I2C0-I2C3

fs/inode/inode.h:  Fix a warning 'inode/inode.h:264:45: error: 'struct stat' declared inside parameter list' by adding a forward reference to struct stat.  Noted by David Sidrane.

ROMFS: Back out 29028bcd.  A cool idea, but loses the EXECUTABLE bit in the file type.

FAT: Fix some errors that I introduced in my review of Alan's patch.  My screw-up, not Alan's.  Sorry.