rockchip: rk3308: Enable ARMv8 crypto and FIT checksum validation

The RK3308 SoC support ARMv8 Cryptography Extensions and use of the
ARMv8 crypto extensions help speed up FIT checksum validation in SPL.

Imply ARMV8_SET_SMPEN and ARMV8_CRYPTO to take advantage of the crypto
extensions for SHA256 when validating checksum of FIT images.

Imply SPL_FIT_SIGNATURE and LEGACY_IMAGE_FORMAT to enable FIT checksum
validation on all RK3308 boards.

Also disable CONFIG_SPL_RAW_IMAGE_SUPPORT in board defconfigs to ensure
SPL does not try to jump to code that failed checksum validation.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index 4a77f18..0902eb28 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -160,8 +160,12 @@
 	select SPL_ATF
 	select SPL_ATF_NO_PLATFORM_PARAM
 	select SPL_LOAD_FIT
+	imply ARMV8_CRYPTO
+	imply ARMV8_SET_SMPEN
+	imply LEGACY_IMAGE_FORMAT
 	imply ROCKCHIP_COMMON_BOARD
 	imply SPL_CLK
+	imply SPL_FIT_SIGNATURE
 	imply SPL_RAM
 	imply SPL_REGMAP
 	imply SPL_ROCKCHIP_COMMON_BOARD