kernel: ARM configuration changes.

CONFIG_DEBUG_LL is now enabled for all ARM kernels and
CONFIG_EARLY_PRINTK is enabled for all kernels.

This patch also fixes some warnings about inconsistencies
with the media stack configuration.
u-boot: Update to 2013.07rc2.

Add u-boot.kwb for Dreamplug and support for
Wandboard Solo and Wandboard Dual.