scripts: Check multiple locations for the dynamic debug control file

Signed-off-by: Alex Forencich <alex@alexforencich.com>

Author: alexforencich

scripts/mqnic_ddcmd.sh

@@ -2,9 +2,17 @@
 
 module=mqnic
 
-#control=/sys/kernel/debug/dynamic_debug/control
 control=/proc/dynamic_debug/control
 
+if ! test -f $control; then
+    control=/sys/kernel/debug/dynamic_debug/control
+fi
+
+if ! test -f $control; then
+    >&2 echo "Error: dynamic debug control file not found"
+    exit 1
+fi
+
 if [ $# -eq 0 ]; then
 	>&2 echo "Error: no argument provided"
 	>&2 echo "usage: $0 [stmt]"