configs: Add cryptsetup support

Petitboot now supports opening encrypted partitions so include the
cryptsetup utility and required kernel options.
In particular this enables CRYPTO_XTS, CRYPTO_USER_API_HASH, and
CRYPTO_USER_API_SKCIPHER.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
diff --git a/openpower/configs/romulus_defconfig b/openpower/configs/romulus_defconfig
index 6f58033..d113b45 100644
--- a/openpower/configs/romulus_defconfig
+++ b/openpower/configs/romulus_defconfig
@@ -27,6 +27,7 @@
 BR2_PACKAGE_LINUX_FIRMWARE=y
 BR2_PACKAGE_LINUX_FIRMWARE_BNX2X=y
 BR2_PACKAGE_LINUX_FIRMWARE_CXGB4_T4=y
+BR2_PACKAGE_CRYPTSETUP=y
 BR2_PACKAGE_IPMITOOL=y
 BR2_PACKAGE_IPMITOOL_USB=y
 BR2_PACKAGE_MDADM=y