rockchip: Add sha256 hash to FIT images

Add sha256 hash to FIT images when CONFIG_SPL_FIT_SIGNATURE=y.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/rockchip-u-boot.dtsi

@@ -50,6 +50,11 @@
 					entry = <CONFIG_TEXT_BASE>;
 					u-boot-nodtb {
 					};
+#ifdef CONFIG_SPL_FIT_SIGNATURE
+					hash {
+						algo = "sha256";
+					};
+#endif
 				};
 
 				@atf-SEQ {
@@ -65,6 +70,11 @@
 
 					atf-bl31 {
 					};
+#ifdef CONFIG_SPL_FIT_SIGNATURE
+					hash {
+						algo = "sha256";
+					};
+#endif
 				};
 				@tee-SEQ {
 					fit,operation = "split-elf";
@@ -80,12 +90,22 @@
 					tee-os {
 						optional;
 					};
+#ifdef CONFIG_SPL_FIT_SIGNATURE
+					hash {
+						algo = "sha256";
+					};
+#endif
 				};
 
 				@fdt-SEQ {
 					description = "fdt-NAME";
 					compression = "none";
 					type = "flat_dt";
+#ifdef CONFIG_SPL_FIT_SIGNATURE
+					hash {
+						algo = "sha256";
+					};
+#endif
 				};
 			};