fpga: Remove all CONFIG_SYS_* fpga related options

All these macros are completely unused by any code.
CONFIG_FPGA is not a bitfield anymore.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@ti.com>
diff --git a/include/configs/MERGERBOX.h b/include/configs/MERGERBOX.h
index c296e3c..30fb6c2 100644
--- a/include/configs/MERGERBOX.h
+++ b/include/configs/MERGERBOX.h
@@ -606,7 +606,7 @@
  * FPGA
  */
 #define CONFIG_FPGA_COUNT	1
-#define CONFIG_FPGA		CONFIG_SYS_ALTERA_CYCLON2
+#define CONFIG_FPGA
 #define CONFIG_FPGA_ALTERA
 #define CONFIG_FPGA_CYCLON2