x86: coral: Align bootph SPI-flash subnodes with parent

The subnode has different tags from the parents, which is not correct.
Fix the subnode.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/dts/chromebook_coral.dts b/arch/x86/dts/chromebook_coral.dts
index 8bfb2c0..2412801 100644
--- a/arch/x86/dts/chromebook_coral.dts
+++ b/arch/x86/dts/chromebook_coral.dts
@@ -369,12 +369,14 @@
 				rw-mrc-cache {
 					label = "rw-mrc-cache";
 					reg = <0x008e0000 0x00010000>;
-					bootph-all;
+					bootph-some-ram;
+					bootph-pre-ram;
 				};
 				rw-var-mrc-cache {
 					label = "rw-mrc-cache";
 					reg = <0x008f0000 0x0001000>;
-					bootph-all;
+					bootph-some-ram;
+					bootph-pre-ram;
 				};
 			};
 		};