Simply avoid getsubopt, since we cannot rely on it.
-diff --git a/utils/v4l2-ctl/v4l2-ctl-common.cpp b/utils/v4l2-ctl/v4l2-ctl-common.cpp
-index 3ea6cd3..291fb3e 100644
--- a/utils/v4l2-ctl/v4l2-ctl-common.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-common.cpp
-@@ -692,16 +692,17 @@ static bool parse_subset(char *optarg)
+@@ -679,16 +679,17 @@ static bool parse_subset(char *optarg)
static bool parse_next_subopt(char **subs, char **value)
{