Simplify the README now that we have aliases

Author: mpe

README.md

@@ -20,13 +20,13 @@ Clone this repo.
 ```
 $ cd ci-scripts
 $ cd build
-$ make pull-image@ppc64le@ubuntu@21.10
-$ make SRC=~/src/linux kernel@ppc64le@ubuntu@21.10 JFACTOR=$(nproc)
+$ make pull-image@ppc64le@ubuntu
+$ make SRC=~/src/linux kernel@ppc64le@ubuntu JFACTOR=$(nproc)
 ```
 
-This will build you a `ppc64le_defconfig` using the Ubuntu 21.10 toolchain.
+This will build you a `ppc64le_defconfig` using the latest Ubuntu toolchain.
 
-The kernel will be in `output/ppc64le@ubuntu@21.10/ppc64le_defconfig/vmlinux`.
+The kernel will be in `output/ppc64le@ubuntu/ppc64le_defconfig/vmlinux`.
 
 For more help try `make help`.
 
@@ -36,14 +36,14 @@ Building different defconfigs
 You can specify a defconfig with `DEFCONFIG`.
 
 ```
-$ make SRC=~/src/linux kernel@ppc64le@ubuntu@21.10 DEFCONFIG=powernv_defconfig JFACTOR=$(nproc)
+$ make SRC=~/src/linux kernel@ppc64le@ubuntu DEFCONFIG=powernv_defconfig JFACTOR=$(nproc)
 ```
 
 Note that the subarch (eg. `ppc64le`) needs to match the defconfig, so to build
 `ppc64_defconfig`, use `ppc64`.
 
 ```
-$ make SRC=~/src/linux kernel@ppc64@ubuntu@21.10 DEFCONFIG=ppc64_defconfig JFACTOR=$(nproc)
+$ make SRC=~/src/linux kernel@ppc64@ubuntu DEFCONFIG=ppc64_defconfig JFACTOR=$(nproc)
 ```
 
 Different toolchains
@@ -74,13 +74,13 @@ Building selftests
 To build the kernel selftests:
 
 ```
-$ make SRC=~/src/linux selftests@ppc64le@ubuntu@21.10 JFACTOR=$(nproc)
+$ make SRC=~/src/linux selftests@ppc64le@ubuntu JFACTOR=$(nproc)
 ```
 
 Or just the powerpc selftests:
 
 ```
-$ make SRC=~/src/linux ppctests@ppc64le@ubuntu@21.10 JFACTOR=$(nproc)
+$ make SRC=~/src/linux ppctests@ppc64le@ubuntu JFACTOR=$(nproc)
 ```
 
 You can also build the powerpc selftests with all available toolchains using:
@@ -94,21 +94,21 @@ Other options
 
 As mentioned above you pass the make -j factor with `JFACTOR=n`.
 
-To run sparse use the `ubuntu@21.10` image and pass `SPARSE=2`.
+To run sparse use the `ubuntu` image and pass `SPARSE=2`.
 
 ```
-$ make SRC=~/src/linux kernel@ppc64le@ubuntu@21.10 SPARSE=2 JFACTOR=$(nproc)
+$ make SRC=~/src/linux kernel@ppc64le@ubuntu SPARSE=2 JFACTOR=$(nproc)
 ```
 
-The log will be in eg. `output/ppc64le@ubuntu@21.10/ppc64le_defconfig/sparse.log`.
+The log will be in eg. `output/ppc64le@ubuntu/ppc64le_defconfig/sparse.log`.
 
 To only run sparse on files being recompiled, pass `SPARSE=1`.
 
 To build modules pass `MODULES=1`
 
 To convert all modules to builtin, pass `MOD2YES=1`.
 
-To build with clang pass `CLANG=1`, only works using the Ubuntu `21.10` images.
+To build with clang pass `CLANG=1`, only works using the latest Ubuntu image.
 
 For a quiet build pass `QUIET=1`, for verbose pass `VERBOSE=1`.
 
@@ -130,7 +130,7 @@ Building your own image
 If you don't want to pull an untrusted image, you can build it yourself with:
 
 ```
-$ make rebuild-image@ppc64le@ubuntu@21.10
+$ make rebuild-image@ppc64le@ubuntu
 ```
 
 Note that the build mounts the source tree read-only, so nothing it does can