wlan: Update SMD and SMSM header includes

The SMD and SMSM kernel header files are being relocated and renamed.
Update the WLAN build logic to determine which flavor of include files
are present, and update the WLAN driver to include the appropriate
files.

Note that this is an interim change.  Once the kernel header file
changes have been deployed, the WLAN driver will again be modified to
only use the new header files.

Change-Id: Icfadb5b9fae0a9489c14e3eaf6a2894dfabafd5b
CRs-fixed: 595745
diff --git a/Kbuild b/Kbuild
index ca2f403..749a6e8 100644
--- a/Kbuild
+++ b/Kbuild
@@ -645,6 +645,14 @@
 
 CDEFINES += -DFEATURE_WLAN_CH_AVOID
 
+ifeq ($(EXISTS_MSM_SMD),1)
+CDEFINES += -DEXISTS_MSM_SMD
+endif
+
+ifeq ($(EXISTS_MSM_SMSM),1)
+CDEFINES += -DEXISTS_MSM_SMSM
+endif
+
 # Fix build for GCC 4.7
 EXTRA_CFLAGS += -Wno-maybe-uninitialized -Wno-unused-function