arm: config: Enable CRC8 support in SPL on imx287 XEA board

The boot0/1 feature uses simple CRC8 to check (in SPL) if
SPI-NOR content is not corrupted, hence the need to enable
it.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/configs/imx28_xea_defconfig b/configs/imx28_xea_defconfig
index c1b0487..64a0561 100644
--- a/configs/imx28_xea_defconfig
+++ b/configs/imx28_xea_defconfig
@@ -123,4 +123,5 @@
 CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_MXS_SPI=y
+CONFIG_SPL_CRC8=y
 # CONFIG_SPL_OF_LIBFDT is not set