qcacmn: Add WIN Driver Compilation fix

Initially, the QCA Wi-Fi driver was ported to support kernel
4.4. However, after the code changes due to converged code,
few issues were re-created when compiled on kernel 4.4.X.

This change resolves the newly introduced issues by the
converged code changes.

Change-Id: Iae76cdfee97675ff4bf2508ce5a42f08515bb168
CRs-Fixed: 1012511

qdf/linux/src/i_qdf_mem.h

@@ -62,7 +62,15 @@
 #define kfree(buf)
 #define vfree(buf)
 #define pci_alloc_consistent(dev, size, paddr) NULL
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)
+/*
+ * typedef to dummy type to overcome implicit declaration error in
+ * spectraltool.c
+ */
+#define __qdf_mempool_t int
+#else
 #define __qdf_mempool_t
+#endif /* LINUX_VERSION_CODE */
 #endif /* __KERNEL__ */
 #include <qdf_status.h>