config/ast2600: Enable CRC32

Useful for testing images with the default hash type.

Reviewed-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/configs/evb-ast2600_defconfig b/configs/evb-ast2600_defconfig
index e62abbd..3dcbcd2 100644
--- a/configs/evb-ast2600_defconfig
+++ b/configs/evb-ast2600_defconfig
@@ -40,6 +40,7 @@
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x2000000
 CONFIG_SPL_SEPARATE_BSS=y
+CONFIG_SPL_CRC32=y
 CONFIG_SPL_FIT_IMAGE_TINY=y
 CONFIG_SPL_DM_RESET=y
 CONFIG_SPL_RAM_SUPPORT=y