default-distrovars: set default KERNEL_IMAGETYPE(S)

With the change from assuming kernels will be named "vmlinuz"
everywhere, to instead using KERNEL_IMAGETYPE, we require that
KERNEL_IMAGETYPE is set to something. Instead of setting the default in
multiple individual files, set it in default-distrovars.inc.

x86(-64) arches get bzImage as the default. Others get zImage as per
meta/conf/documentation.conf.

Also set KERNEL_IMAGETYPES, as we will eventually be switching away from
KERNEL_IMAGETYPE.

Thanks to Andre McCurdy <armccurdy@gmail.com> for the arch defaults
part.

(From OE-Core rev: a57d784211a39587538094425ee0246e9ddfbf9d)

Signed-off-by: California Sullivan <california.l.sullivan@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/grub-efi-cfg.bbclass

@@ -22,7 +22,6 @@ GRUB_CFG_LIVE = "${S}/grub_live.cfg"
 GRUB_TIMEOUT ?= "10"
 #FIXME: build this from the machine config
 GRUB_OPTS ?= "serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1"
-KERNEL_IMAGETYPE ??= "bzImage"
 
 EFIDIR = "/EFI/BOOT"
 GRUB_ROOT ?= "${ROOT}"

meta/classes/live-vm-common.bbclass

@@ -32,8 +32,6 @@ PCBIOS_CLASS = "${@['','syslinux'][d.getVar('PCBIOS') == '1']}"
 inherit ${EFI_CLASS}
 inherit ${PCBIOS_CLASS}
 
-KERNEL_IMAGETYPE ??= "bzImage"
-
 populate_kernel() {
 	dest=$1
 	install -d $dest

meta/classes/syslinux.bbclass

@@ -21,7 +21,6 @@ do_bootimg[depends] += "${MLPREFIX}syslinux:do_populate_sysroot \
                         syslinux-native:do_populate_sysroot"
 
 ISOLINUXDIR ?= "/isolinux"
-KERNEL_IMAGETYPE ??= "bzImage"
 SYSLINUXDIR = "/"
 # The kernel has an internal default console, which you can override with
 # a console=...some_tty...

meta/classes/systemd-boot-cfg.bbclass

@@ -1,5 +1,3 @@
-KERNEL_IMAGETYPE ??= "bzImage"
-
 SYSTEMD_BOOT_CFG ?= "${S}/loader.conf"
 SYSTEMD_BOOT_ENTRIES ?= ""
 SYSTEMD_BOOT_TIMEOUT ?= "10"

meta/conf/distro/include/default-distrovars.inc

@@ -47,3 +47,9 @@ BB_STRICT_CHECKSUM = "1"
 
 GTK2DISTROFEATURES = "directfb x11"
 GTK3DISTROFEATURES = "x11 wayland"
+
+ARCH_DEFAULT_KERNELIMAGETYPE = "zImage"
+ARCH_DEFAULT_KERNELIMAGETYPE_x86 = "bzImage"
+ARCH_DEFAULT_KERNELIMAGETYPE_x86-64 = "bzImage"
+KERNEL_IMAGETYPE ??= "${ARCH_DEFAULT_KERNELIMAGETYPE}"
+KERNEL_IMAGETYPES ??= "${KERNEL_IMAGETYPE}"