drivers/misc: Move conditional compilation to Makefile

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/Sandpoint8240.h b/include/configs/Sandpoint8240.h
index 5bbe3c5..c5a57d3 100644
--- a/include/configs/Sandpoint8240.h
+++ b/include/configs/Sandpoint8240.h
@@ -246,7 +246,7 @@
 /*
  * NS87308 Configuration
  */
-#define CFG_NS87308			/* Nat Semi super-io controller on ISA bus */
+#define CONFIG_NS87308			/* Nat Semi super-io controller on ISA bus */
 
 #define CFG_NS87308_BADDR_10	1