preempt_rt: Handle RC kernels and add 6.1 RC to mapping

linux-tkg-config/prepare

@@ -48,6 +48,7 @@ _rt_subver_map=(
   ["5.16"]="2"
   ["5.17"]="1"
   ["6.0"]="5"
+  ["6.1"]="rc3"
 )
 
 # PREEMPT_RT's patch revision for the kernel
@@ -63,6 +64,7 @@ _rt_rev_map=(
   ["5.16"]="19"
   ["5.17"]="17"
   ["6.0"]="14"
+  ["6.1"]="2"
 )
 
 _undefine() {
@@ -646,7 +648,12 @@ _tkg_srcprep() {
       preempt_rt_ksubver="${_rt_subver_map[$_basekernel]}"
       # Check if subversion is supported, skip check if forced
       if [ "${_preempt_rt_force}" = "1" ] || [ "${preempt_rt_ksubver}" = "${_sub}" ]; then
-        preempt_rt_file_gz="patch-${_basekernel}.${preempt_rt_ksubver}-rt${_rt_rev_map["$_basekernel"]}.patch.gz"
+        if [[ "${_sub}" == *rc* ]]; then
+          _separator="-"
+        else
+          _separator="."
+        fi
+        preempt_rt_file_gz="patch-${_basekernel}${_separator}${preempt_rt_ksubver}-rt${_rt_rev_map["$_basekernel"]}.patch.gz"
         preempt_rt_file=`basename ${preempt_rt_file_gz} .gz`
         curl "https://cdn.kernel.org/pub/linux/kernel/projects/rt/${_basekernel}/${preempt_rt_file_gz}" > "$srcdir"/"${preempt_rt_file_gz}"
         last_pwd=`pwd`