qcacmn: Support per mac CE for WMI commands

Firmware requires WMI commands to be sent on different copy engine for
each MAC. Change CE assignement to support this.

Change-Id: I91a2422a944741dc25c3bf45b18cde30e7409632
CRs-Fixed: 2005214
diff --git a/hif/src/ce/ce_api.h b/hif/src/ce/ce_api.h
index 0afe160..53b0b3c 100644
--- a/hif/src/ce/ce_api.h
+++ b/hif/src/ce/ce_api.h
@@ -399,6 +399,7 @@
 #define CE_ATTR_SWIZZLE_DESCRIPTORS  0x04 /* Swizzle descriptors? */
 #define CE_ATTR_DISABLE_INTR         0x08 /* no interrupt on copy completion */
 #define CE_ATTR_ENABLE_POLL          0x10 /* poll for residue descriptors */
+#define CE_ATTR_DIAG                 0x20 /* Diag CE */
 
 /* Attributes of an instance of a Copy Engine */
 struct CE_attr {