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-openbmc-bsp/meta-aspeed/common/recipes-kernel/linux/linux-aspeed.inc b/meta-openbmc-bsp/meta-aspeed/common/recipes-kernel/linux/linux-aspeed.inc
new file mode 100644
index 0000000..5567840
--- /dev/null
+++ b/meta-openbmc-bsp/meta-aspeed/common/recipes-kernel/linux/linux-aspeed.inc
@@ -0,0 +1,29 @@
+DESCRIPTION = "Linux kernel for Aspeed"
+SECTION = "kernel"
+LICENSE = "GPLv2"
+
+PROVIDES += "virtual/kernel"
+
+KCONFIG_MODE="--alldefconfig"
+
+KSRC ?= "git://github.com/openbmc/linux;protocol=git;branch=${KBRANCH}"
+SRC_URI = "${KSRC}"
+SRC_URI_append_ast2400 = " file://ast2400/defconfig"
+SRC_URI_append_ast2500 = " file://ast2500/defconfig"
+
+LINUX_VERSION_EXTENSION ?= "-${SRCREV}"
+
+PV = "${LINUX_VERSION}+git${SRCPV}"
+
+do_patch_append() {
+        for DTB in "${KERNEL_DEVICETREE}"; do
+               DT=`basename ${DTB} .dtb`
+                if [ -r "${WORKDIR}/${DT}.dts" ]; then
+                        cp ${WORKDIR}/${DT}.dts \
+                                ${STAGING_KERNEL_DIR}/arch/${ARCH}/boot/dts
+               fi
+       done
+}
+
+inherit kernel
+require recipes-kernel/linux/linux-yocto.inc