This simply updates the LPC18xx defconfig against the current
Kconfig structure in the kernel so we can make changed to the
defconfig without disturbing noise.

Cc: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>