Improve configuration of FPGA subsystem

This patch removes the FPGA subsystem configuration through
the CONFIG_FPGA bitmask configuration option.

See README for the new options:

	CONFIG_FPGA,
	CONFIG_FPGA_<vendor>,
	CONFIG_FPGA_<family>

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
diff --git a/include/configs/alpr.h b/include/configs/alpr.h
index aff9823..cfe08c8 100644
--- a/include/configs/alpr.h
+++ b/include/configs/alpr.h
@@ -296,7 +296,9 @@
 /*-----------------------------------------------------------------------
  * FPGA stuff
  *-----------------------------------------------------------------------*/
-#define CONFIG_FPGA             CFG_ALTERA_CYCLON2
+#define CONFIG_FPGA
+#define CONFIG_FPGA_ALTERA
+#define CONFIG_FPGA_CYCLON2
 #define CFG_FPGA_CHECK_CTRLC
 #define CFG_FPGA_PROG_FEEDBACK
 #define CONFIG_FPGA_COUNT       1		/* Ich habe 2 ... aber in