staging: fsl-dpaa2/ethsw: Add comments to ETHSW_VLAN flags

Document each ETHSW_VLAN flag with the appropriate comment.
Signed-off-by: Razvan Stefanescu <razvan.stefanescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/1562336836-17119-7-git-send-email-ioana.ciornei@nxp.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-dpaa2/ethsw/ethsw.h

@@ -23,9 +23,13 @@
 /* Number of IRQs supported */
 #define DPSW_IRQ_NUM	2
 
+/* Port is member of VLAN */
 #define ETHSW_VLAN_MEMBER	1
+/* VLAN to be treated as untagged on egress */
 #define ETHSW_VLAN_UNTAGGED	2
+/* Untagged frames will be assigned to this VLAN */
 #define ETHSW_VLAN_PVID		4
+/* VLAN configured on the switch */
 #define ETHSW_VLAN_GLOBAL	8
 
 /* Maximum Frame Length supported by HW (currently 10k) */