sdcard_image-rpi.bbclass: drop KERNEL_INITRAMFS variable

* use INITRAMFS_SYMLINK_NAME from new kernel-artifact-names.bbclass
  instead of KERNEL_INITRAMFS
* the documentation says that KERNEL_INITRAMFS should be used to
  define extension of initramfs, but in linux-raspberrypi.inc it's
  defined only to 1 or empty based on INITRAMFS_IMAGE_BUNDLE variable
  and I don't see any code in meta-raspberry or oe-core which would
  use KERNEL_INITRAMFS to actualy name the initramfs artifact to create:
  ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin
  used in classes/sdcard_image-rpi.bbclass
* also fix the assumption that there is -${MACHINE} suffix in:
  ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin
  because that's defined as KERNEL_IMAGE_SYMLINK_NAME and some DISTROs
  might use different value
* this depends on oe-core changes which were merged today:
  http://git.openembedded.org/openembedded-core/commit/?id=7d0ef0eaa1bfe97015a774c26f5791622e7e8b12
* this is the last piece of previous pull-request:
  https://github.com/agherzan/meta-raspberrypi/pull/159

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/docs/extra-build-config.md b/docs/extra-build-config.md
index 04314aa..79cf3c7 100644
--- a/docs/extra-build-config.md
+++ b/docs/extra-build-config.md
@@ -167,9 +167,6 @@ To build an initramfs image:
   - `INITRAMFS_IMAGE = "<a name for your initramfs image>"`
   - `INITRAMFS_IMAGE_BUNDLE = "1"`
 
-* Set the meta-rasberrypi variable (in raspberrypi.conf for example)
-  - `KERNEL_INITRAMFS = "-initramfs"`
-
 ## Enable SPI bus
 
 When using device tree kernels, set this variable to enable the SPI bus: