rockchip: boot0: update CONFIG_ROCKCHIP_SPL_RESERVE_IRAM for SPL only

The CONFIG_ROCKCHIP_SPL_RESERVE_IRAM is for SPL only, add
condition to limit it not affect TPL.
Signed-off-by: NKever Yang <kever.yang@rock-chips.com>

arch/arm/include/asm/arch-rockchip/boot0.h

@@ -54,6 +54,7 @@ _start:
 	ARM_VECTORS
 #endif
 
-#if defined(CONFIG_SPL_BUILD) && (CONFIG_ROCKCHIP_SPL_RESERVE_IRAM > 0)
+#if !defined(CONFIG_TPL_BUILD) && defined(CONFIG_SPL_BUILD) && \
+	(CONFIG_ROCKCHIP_SPL_RESERVE_IRAM > 0)
 	.space CONFIG_ROCKCHIP_SPL_RESERVE_IRAM	/* space for the ATF data */
 #endif