kdumpctl/estimate: Fix unnecessary warning

do_estimate prints the warning that the reserved crashkernel is lower
than the recommended one even then when both values are identical. This
might cause confusion. So omit printing the warning when both values are
equal.

Signed-off-by: Philipp Rudo <prudo@redhat.com>
Acked-by: Coiby Xu <coxu@redhat.com>

kdumpctl

@@ -1270,7 +1270,7 @@ do_estimate()
 		done
 	fi
 
-	if [[ $reserved_size -le $recommended_size ]]; then
+	if [[ $reserved_size -lt $recommended_size ]]; then
 		echo "WARNING: Current crashkernel size is lower than recommended size $((recommended_size / size_mb))M."
 	fi
 }