ARM: configs: update lpc18xx defconfig

- Enable SPIFI Flash and JFFS2 to support rootfs on Flash memory
- Enable USB Phy, mass storage and SCSI to support USB memory
- Enable PCF857x and JC42 I2C devices found on Hitex board
- Enable PL172 to support memory mapped NOR Flash
- New LPC18xx drivers: I2C, Watchdog, SCT PWM and RTC

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>