Move all QEMU machines to use a common kernel recipe set and version

The different kernel recipes encapsulate functionality groups for machines,
therefore it makes sense to have all the QEMU machines using the same kernel
recipe.

Switch the QEMU machines to default to the "linux" recipes for their kernel
and bump the latest recipe from linux-2.6.32 to 2.6.33.

Signed-off-by: Joshua Lock <josh@linux.intel.com>

meta/packages/linux/linux_2.6.33.bb

@@ -3,10 +3,8 @@ require linux.inc
 # Mark archs/machines that this kernel supports
 DEFAULT_PREFERENCE = "-1"
 DEFAULT_PREFERENCE_mpc8313erdb = "1"
-DEFAULT_PREFERENCE_qemuppc = "1"
-DEFAULT_PREFERENCE_qemux86 = "1"
 
-PR = "r1"
+PR = "r2"
 
 SRC_URI = "${KERNELORG_MIRROR}/pub/linux/kernel/v2.6/linux-${PV}.tar.bz2 \
            file://defconfig \