qcacmn: Add qdf api to return nbuf size from data to end ptr

Add api to qdf abstraction framework to return size of nbuf
from nbuf data pointer to end pointer.

Change-Id: I8a450306ddcaa7c6a85607425bc1c1fd26c4e1e4
CRs-Fixed: 2767763

qdf/inc/qdf_nbuf.h

@@ -3809,6 +3809,19 @@ static inline uint32_t qdf_nbuf_get_mark(qdf_nbuf_t nbuf)
 	return __qdf_nbuf_get_mark(nbuf);
 }
 
+/**
+ * qdf_nbuf_get_data_len() - Return the size of the nbuf from
+ * data pointer to end pointer
+ * @nbuf: qdf_nbuf_t
+ *
+ * Return: size of network buffer from data pointer to end
+ * pointer
+ */
+static inline qdf_size_t qdf_nbuf_get_data_len(qdf_nbuf_t nbuf)
+{
+	return __qdf_nbuf_get_data_len(nbuf);
+}
+
 #ifdef NBUF_FRAG_MEMORY_DEBUG
 
 #define qdf_nbuf_move_frag_page_offset(f, i, o) \