devtools/cocci: add script for ethdev namespace change

The cocci script is to help add prefix 'RTE_ETH' namespace to enum
& macro of ethdev library. It helps in automating these changes for
applications. The script won't make changes in the code comment part.
Usage: spatch <script path> <app path>

Signed-off-by: Aman Singh <aman.deep.singh@intel.com>
Tested-by: Ferruh Yigit <ferruh.yigit@intel.com>

devtools/cocci/namespace_ethdev.cocci

@@ -0,0 +1,48 @@
+@rule1@
+identifier I =~  "^(RTE_FC_|ETH_MQ_|ETH_RSS|DEV_RX_|DEV_TX_|ETH_LINK|RTE_RETA|
+|ETH_DCB|RTE_TUNNEL|ETH_VLAN|ETH_4|ETH_8|ETH_16|ETH_32|ETH_64|RTE_FDIR|RTE_L2|
+|ETH_SPEED|ETH_MIRROR|ETH_VMDQ|ETH_NUM|ETH_QINQ|ETH_MAX_)";
+@@
+I
+
+@ script : python p@
+I << rule1.I;
+J;
+@@
+coccinelle .J="RTE_ETH_" + I[4:];
+
+exception_matches = ["ETH_VLAN_FILTER_CLASSIFY","ETH_VLAN_FILTER_ANY",
+"ETH_VLAN_FILTER_SPEC","ETH_RSS_MODE","ETH_RSS_UPDATE","RTE_FDIR_MODE",
+"RTE_FDIR_NO","RTE_FDIR_REPORT","ETH_MAX_RX_CLIENTS_E1H",
+"ETH_MAX_AGGREGATION_QUEUES_E1","ETH_RSS_ENGINE_NUM","ETH_NUM_MAC_FILTERS",
+"ETH_MAX_NUM_RX_QUEUES_PER_VF_QUAD","ETH_RSS_IND_TABLE_ENTRIES_NUM",
+"ETH_RSS_KEY_SIZE_REGS","ETH_NUM_STATISTIC_COUNTERS","ETH_SPEED_"]
+
+if any(x in I for x in exception_matches):
+        coccinelle .J= I;
+
+@ identifier@
+identifier rule1.I;
+identifier p.J;
+@@
+- I
++ J
+
+// Below rule for structures only
+@rule2@
+identifier A  =~  "rte_fdir_conf|rte_intr_conf";
+@@
+struct A
+
+@ script : python p2@
+A << rule2.A;
+B;
+@@
+coccinelle .B="rte_eth_" + A[4:];
+
+@ identifier2@
+identifier rule2.A;
+identifier p2.B;
+@@
+- struct A
++ struct B