rainier: Enable pstore to expose ramoops data

Change-Id: Iba5e0546fefc9c170941afc661f0944cbee867fe
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/recipes-kernel/linux/linux-aspeed/rainier.cfg b/recipes-kernel/linux/linux-aspeed/rainier.cfg
index dc41d58..f79ad4e 100644
--- a/recipes-kernel/linux/linux-aspeed/rainier.cfg
+++ b/recipes-kernel/linux/linux-aspeed/rainier.cfg
@@ -5,3 +5,7 @@
 CONFIG_RTC_DRV_RV8803=y
 CONFIG_IIO=y
 CONFIG_BMP280=y
+CONFIG_PSTORE=y
+CONFIG_PSTORE_CONSOLE=y
+CONFIG_PSTORE_PMSG=y
+CONFIG_PSTORE_RAM=y