param_shmem: fixes for params on Snapdragon

On Snapdragon we can't yet use the "used" mask for parameters and
therefore need to send all of them down to the ground station. All
params were set to used in an earlier commit but the count and index
function didn't reflect this change. This is fixed now, therefore we can
successfully receive all params in QGC.

src/modules/systemlib/param/param_shmem.c

@@ -307,6 +307,8 @@ param_count(void)
 unsigned
 param_count_used(void)
 {
+	//TODO FIXME: all params used right now
+#if 0
 	unsigned count = 0;
 
 	// ensure the allocation has been done
@@ -322,6 +324,9 @@ param_count_used(void)
 	}
 
 	return count;
+#else
+	return get_param_info_count();
+#endif
 }
 
 param_t
@@ -378,6 +383,8 @@ param_get_index(param_t param)
 int
 param_get_used_index(param_t param)
 {
+	// TODO FIXME: the used bit is not supported right now, therefore just count all.
+#if 0
 	/* this tests for out of bounds and does a constant time lookup */
 	if (!param_used(param)) {
 		return -1;
@@ -388,6 +395,7 @@ param_get_used_index(param_t param)
 
 	for (unsigned i = 0; i < (unsigned)size_param_changed_storage_bytes; i++) {
 		for (unsigned j = 0; j < bits_per_allocation_unit; j++) {
+
 			if (param_changed_storage[i] & (1 << j)) {
 
 				if ((unsigned)param == i * bits_per_allocation_unit + j) {
@@ -398,8 +406,11 @@ param_get_used_index(param_t param)
 			}
 		}
 	}
-
 	return -1;
+#else
+	return param;
+#endif
+
 }
 
 const char *