ARM: ux500: u8500_defconfig: Enable PARTITION_ADVANCED

There are both (e)MMC/SD-card support in ux500, thus it's reasonable to
support partitions for block devices as default.

While updating the defconfig, we rebase it towards Kconfig changes.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>