configs/palmetto_defconfig: Update linux to c0409752

Benjamin Herrenschmidt (4):
      powerpc/powernv: Support OPAL requested heartbeat
      drivers/core/of: Add symlink to device-tree from devices with an OF node
      of/base: Fix PowerPC address parsing hack
      i2c/opal: Adapt for firmware DT updates

Jeremy Kerr (3):
      powerpc/configs: Add I2C_CHARDEV to skiroot_defconfig
      powerpc/configs/skiroot_defconfig: Fix invalid config changes
      powerpc/configs/skiroot_defconfig: Enable AT24 EEPROM driver

Neelesh Gupta (1):
      i2c: Driver to expose PowerNV platform i2c busses

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/openpower/configs/palmetto_defconfig b/openpower/configs/palmetto_defconfig
index 95bb320..75de67b 100644
--- a/openpower/configs/palmetto_defconfig
+++ b/openpower/configs/palmetto_defconfig
@@ -30,7 +30,7 @@
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_GIT=y
 BR2_LINUX_KERNEL_CUSTOM_REPO_URL="git://github.com/open-power/linux.git"
-BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="1dcee5aa497515a9e0fac3af9a86eaad41c77c1f"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="c04097526152ef45ed87b4a89c5e52fc8f856d34"
 BR2_LINUX_KERNEL_USE_DEFCONFIG=y
 BR2_LINUX_KERNEL_DEFCONFIG="skiroot"
 BR2_LINUX_KERNEL_ZIMAGE_EPAPR=y