sound: Add export.h for THIS_MODULE/EXPORT_SYMBOL where needed
These aren't modules, but they do make use of these macros, so
they will need export.h to get that definition. Previously,
they got it via the implicit module.h inclusion.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 143c705..9077aa4 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -17,6 +17,7 @@
#include <linux/lzo.h>
#include <linux/bitmap.h>
#include <linux/rbtree.h>
+#include <linux/export.h>
#include <trace/events/asoc.h>