Change pseries_defconfig to pseries; linux.mk adds _defconfig
diff --git a/openpower/configs/palmetto_defconfig b/openpower/configs/palmetto_defconfig
index 483c976..15c3767 100644
--- a/openpower/configs/palmetto_defconfig
+++ b/openpower/configs/palmetto_defconfig
@@ -20,7 +20,7 @@
 BR2_TARGET_SKIBOOT_EMBED_PAYLOAD=y
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_USE_DEFCONFIG=y
-BR2_LINUX_KERNEL_DEFCONFIG="pseries_defconfig"
+BR2_LINUX_KERNEL_DEFCONFIG="pseries"
 BR2_LINUX_KERNEL_ZIMAGE_EPAPR=y
 
 # petitboot requirements