fix initramfs generation

mk/image.mk

@@ -175,6 +175,10 @@ createinitramfs: ${STAGING_TARGET_DIR}/${INITRAMFS}_list
 		echo 'CONFIG_INITRAMFS_SOURCE="${STAGING_TARGET_DIR}/${INITRAMFS}_list"'; \
 		echo '# CONFIG_INITRAMFS_COMPRESSION_NONE is not set'; \
 		echo 'CONFIG_CRC32_BIT=y'; \
+		echo '# CONFIG_CRC32_SELFTEST is not set'; \
+		echo '# CONFIG_CRC32_SLICEBY8 is not set'; \
+		echo '# CONFIG_CRC32_SLICEBY4 is not set'; \
+		echo '# CONFIG_CRC32_SARWATE is not set'; \
 		echo 'CONFIG_INITRAMFS_ROOT_UID=0'; \
 		echo 'CONFIG_INITRAMFS_ROOT_GID=0'; \
 	) >> ${LINUX_DIR}/.config