qcacmn: Fix spectral scan compilation errors

Fix spectral scan component compilation errors
on MCL build system.

Change-Id: I903431fba923859e796e0786354608cac2841b0c
CRs-Fixed: 2160819

target_if/spectral/target_if_spectral_sim.h

@@ -20,7 +20,7 @@
 #ifndef _SPECTRAL_SIM_H_
 #define _SPECTRAL_SIM_H_
 
-#if QCA_SUPPORT_SPECTRAL_SIMULATION
+#ifdef QCA_SUPPORT_SPECTRAL_SIMULATION
 #include "target_if_spectral.h"
 
 /**