Linux-aspeed: Restore kernel crypto related items needed by systemd

During kernel version upgrade, these default config items in blow commit are missing:
https://gerrit.openbmc-project.xyz/#/c/8323/

systemd 233+ needs these items for some apis:
https://lists.freedesktop.org/archives/systemd-devel/2017-March/038419.html

Change-Id: I9eff59683d37d4922fa32b2bc32374f4c88862c4
Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
diff --git a/meta-openbmc-bsp/meta-aspeed/recipes-kernel/linux/linux-aspeed/ast2500/defconfig b/meta-openbmc-bsp/meta-aspeed/recipes-kernel/linux/linux-aspeed/ast2500/defconfig
index a458c7e..bab5f07 100755
--- a/meta-openbmc-bsp/meta-aspeed/recipes-kernel/linux/linux-aspeed/ast2500/defconfig
+++ b/meta-openbmc-bsp/meta-aspeed/recipes-kernel/linux/linux-aspeed/ast2500/defconfig
@@ -243,6 +243,9 @@
 CONFIG_HARDENED_USERCOPY=y
 CONFIG_FORTIFY_SOURCE=y
 # CONFIG_CRYPTO_ECHAINIV is not set
+CONFIG_CRYPTO_HMAC=y
+CONFIG_CRYPTO_SHA256=y
+CONFIG_CRYPTO_USER_API_HASH=y
 # CONFIG_CRYPTO_HW is not set
 # CONFIG_XZ_DEC_X86 is not set
 # CONFIG_XZ_DEC_POWERPC is not set