Multiple changes in initrd 'build' script:
(1) Add 'cpio --version' check so we don't invoke incompatible cpio.
(2) Use poor man's 'which' command.
(3) Improve filename sorting when creating cpio.
Updated kernel config. (And so it needs to be rebuilt). Changes:
(1) Disable CC_OPTIMIZE_FOR_SIZE
(2) Support x86 extended platforms (Intel MID, Medfield)
(3) Add hwmon drivers connected through SPI and IPMI
(4) Removed hwmon drivers through IndustrialIO
(5) Removed I2C system bus drivers (for embedded)