Rename and move kernel recipe

Rename linux-obmc to linux-aspeed and move to the Aspeed
layer.  Like recipes for u-boot forks, recipes for kernel
forks in support of different SOCs are typically provided
in the BSP supporting the SOC.

Moved a number of phosphor-isms out of the kernel recipe and put
those in a bbappend in aspeed-layer/bbappend.

Removed COMPATIBLE_MACHINE setting.  We simply use PREFERRED_PROVIDER
in machine configuration files to set the default kernel recipe.

Tested: Booted spoon/palmetto images using QEMU
Change-Id: I7dc73629cad4789dcd5aeb0f7b6214fe064c6adc
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-msn/recipes-kernel/linux/linux-obmc/msn.cfg b/meta-msn/recipes-kernel/linux/linux-aspeed/msn.cfg
similarity index 100%
rename from meta-msn/recipes-kernel/linux/linux-obmc/msn.cfg
rename to meta-msn/recipes-kernel/linux/linux-aspeed/msn.cfg
diff --git a/meta-msn/recipes-kernel/linux/linux-obmc_%.bbappend b/meta-msn/recipes-kernel/linux/linux-aspeed_%.bbappend
similarity index 100%
rename from meta-msn/recipes-kernel/linux/linux-obmc_%.bbappend
rename to meta-msn/recipes-kernel/linux/linux-aspeed_%.bbappend