FPGA: move fpga drivers to drivers/fpga

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/Makefile b/Makefile
index befb608..4eff1b5 100644
--- a/Makefile
+++ b/Makefile
@@ -221,6 +221,7 @@
 LIBS += drivers/bios_emulator/libatibiosemu.a
 LIBS += drivers/block/libblock.a
 LIBS += drivers/dma/libdma.a
+LIBS += drivers/fpga/libfpga.a
 LIBS += drivers/hwmon/libhwmon.a
 LIBS += drivers/i2c/libi2c.a
 LIBS += drivers/input/libinput.a