arm: remove support for hardknott and older

No testing is being done against older branches.  Only have the
compatibility set to honister to prevent any issues.

Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-autonomy/conf/layer.conf

@@ -17,7 +17,7 @@ LAYERDEPENDS_meta-arm-autonomy = " \
    networking-layer \
    virtualization-layer \
 "
-LAYERSERIES_COMPAT_meta-arm-autonomy = "hardknott honister"
+LAYERSERIES_COMPAT_meta-arm-autonomy = "honister"
 
 # We don't activate virtualization feature from meta-virtualization as it
 # brings in lots of stuff we don't need. We need to disable the sanity check

meta-arm-bsp/conf/layer.conf

@@ -9,7 +9,7 @@ BBFILE_COLLECTIONS += "meta-arm-bsp"
 BBFILE_PATTERN_meta-arm-bsp = "^${LAYERDIR}/"
 BBFILE_PRIORITY_meta-arm-bsp = "5"
 
-LAYERSERIES_COMPAT_meta-arm-bsp = "hardknott honister"
+LAYERSERIES_COMPAT_meta-arm-bsp = "honister"
 
 LAYERDEPENDS_meta-arm-bsp = "core meta-arm"
 # This won't be used by layerindex-fetch, but works everywhere else

meta-arm/conf/layer.conf

@@ -13,4 +13,4 @@ LAYERDEPENDS_meta-arm = " \
     core \
     arm-toolchain \
 "
-LAYERSERIES_COMPAT_meta-arm = "hardknott honister"
+LAYERSERIES_COMPAT_meta-arm = "honister"

meta-atp/conf/layer.conf

@@ -6,4 +6,4 @@ BBFILE_COLLECTIONS += "meta-atp"
 BBFILE_PATTERN_meta-atp = "^${LAYERDIR}/"
 
 LAYERDEPENDS_meta-atp = "core openembedded-layer meta-gem5"
-LAYERSERIES_COMPAT_meta-atp = "gatesgarth hardknott honister"
+LAYERSERIES_COMPAT_meta-atp = "honister"

meta-gem5/conf/layer.conf

@@ -10,7 +10,7 @@ BBFILE_PATTERN_meta-gem5 = "^${LAYERDIR}/"
 BBFILE_PRIORITY_meta-gem5 = "5"
 
 LAYERDEPENDS_meta-gem5 = "core openembedded-layer meta-arm"
-LAYERSERIES_COMPAT_meta-gem5 = "hardknott honister"
+LAYERSERIES_COMPAT_meta-gem5 = "honister"
 
 BBFILES_DYNAMIC += " \
     virtualization-layer:${LAYERDIR}/dynamic-layers/meta-virtualization/*/*/*.bbappend \