dts: P1010RDB: Add eSPI slave DT nodes

Add DT nodes for eSPI slave device SPI flash.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/arch/powerpc/dts/p1010rdb-pa_36b.dts b/arch/powerpc/dts/p1010rdb-pa_36b.dts
index b943de7..062086a 100644
--- a/arch/powerpc/dts/p1010rdb-pa_36b.dts
+++ b/arch/powerpc/dts/p1010rdb-pa_36b.dts
@@ -15,3 +15,4 @@
 };
 
 /include/ "p1010si-post.dtsi"
+/include/ "p1010rdb.dtsi"