linux-yocto: update to v3.0.18 + features

linux-yocto: update to v3.0.18 + features

The -stable team released v3.0.18, so it becomes the new base for the
linux-yocto_3.0 recipe.

Along with the 3.0.18 update this kernel refresh brings in the following
changes:

  59314a3 meta/beagleboard: Using CONFIG_PANEL_GENERIC_DPI=y
  b168325 crownbay: use emgd-1.10
  281b80f kver: bumping to v3.0.18
  0d5d0dd common-pc*: add SMP and virtio

(From OE-Core rev: b58d330a88a64ac8ff82362cc90cc817f38b82cd)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>