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>

drivers/fpga/fpga.c

@@ -5,7 +5,6 @@
  */
 
 /* Generic FPGA support */
-#include <common.h>             /* core U-Boot definitions */
 #include <init.h>
 #include <log.h>
 #include <xilinx.h>             /* xilinx specific definitions */