build: build biccommands always

Limit the amount of code that is #ifdef'd out from a normal
build, so compile issues do not escape, by only #ifdef'ing
out the function that registers the BIC-based IPMI handlers
and not the majority of the code to handle BIC-related IPMI
commands.  This allows us to identify compile failures in
unit-testing.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I2131f81890865c8189c6846987c5068373c68203
diff --git a/src/biccommands.cpp b/src/biccommands.cpp
index 017690c..6932b6f 100644
--- a/src/biccommands.cpp
+++ b/src/biccommands.cpp
@@ -31,7 +31,9 @@
 
 using namespace phosphor::logging;
 
+#ifdef BIC_ENABLED
 static void registerBICFunctions() __attribute__((constructor));
+#endif
 
 extern message::Response::ptr executeIpmiCommand(message::Request::ptr);