fpga: Remove <common.h> and add needed includes

Remove <common.h> from this driver directory and when needed
add missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/fpga/spartan3.c b/drivers/fpga/spartan3.c
index e892fa5..b4d87d4 100644
--- a/drivers/fpga/spartan3.c
+++ b/drivers/fpga/spartan3.c
@@ -11,8 +11,9 @@
 
 #define LOG_CATEGORY UCLASS_FPGA
 
-#include <common.h>		/* core U-Boot definitions */
+#include <config.h>		/* core U-Boot definitions */
 #include <log.h>
+#include <time.h>
 #include <spartan3.h>		/* Spartan-II device family */
 
 /* Note: The assumption is that we cannot possibly run fast enough to