rockchip: Fix u-boot-rockchip.bin build

Currently there are a few arm32 rockchip board configs that don't
generate u-boot-rockchip.bin when running make because CONFIG_BINMAN
is not enabled. This patch changes CONFIG_ARCH_ROCKCHIP to also select
CONFIG_BINMAN if CONFIG_SPL and !CONFIG_ARM64.

Example builds that don't generate u-boot-rockchip.bin without this
patch:

export ARCH=arm
export CROSS_COMPILE=/usr/bin/arm-linux-gnueabihf-
make kylin-rk3036_defconfig
make

export ARCH=arm
export CROSS_COMPILE=/usr/bin/arm-linux-gnueabihf-
make rock_defconfig
make

export ARCH=arm
export CROSS_COMPILE=/usr/bin/arm-linux-gnueabihf-
make tinker-rk3288_defconfig
make
Signed-off-by: NJohan Gunnarsson <johan.gunnarsson@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NKever Yang <kever.yang@rock-chips.com>

arch/arm/Kconfig

@@ -1801,7 +1801,7 @@ config ARCH_STM32MP
 config ARCH_ROCKCHIP
 	bool "Support Rockchip SoCs"
 	select BLK
-	select BINMAN if SPL_OPTEE
+	select BINMAN if SPL_OPTEE || (SPL && !ARM64)
 	select DM
 	select DM_GPIO
 	select DM_I2C