Convert CONFIG_FPGA_STRATIX_V to Kconfig

This converts the following to Kconfig:
   CONFIG_FPGA_STRATIX_V

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/theadorable_debug_defconfig b/configs/theadorable_debug_defconfig
index 25eb2e8..d47413c 100644
--- a/configs/theadorable_debug_defconfig
+++ b/configs/theadorable_debug_defconfig
@@ -71,6 +71,7 @@
 CONFIG_BOOTCOUNT_LIMIT=y
 CONFIG_BOOTCOUNT_RAM=y
 CONFIG_FPGA_ALTERA=y
+CONFIG_FPGA_STRATIX_V=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_MVTWSI=y
 # CONFIG_MMC is not set