linux: update to v4.2.3-openpower1

 - Dropped 'net/bnx2x: Add shutdown handler' as this is upstream
 - Added 'fbcon: initialize blink interval before calling fb_set_par'
 - Rebased on v4.2.3 stable release

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/configs/firestone_defconfig b/openpower/configs/firestone_defconfig
index 10835f2..a0f9f47 100644
--- a/openpower/configs/firestone_defconfig
+++ b/openpower/configs/firestone_defconfig
@@ -43,7 +43,7 @@
 BR2_ROOTFS_DEVICE_TABLE="../openpower/device_table.txt"
 BR2_ROOTFS_POST_BUILD_SCRIPT="../openpower/scripts/fixup-target-var"
 BR2_LINUX_KERNEL=y
-BR2_LINUX_KERNEL_VERSION="4.2.1"
+BR2_LINUX_KERNEL_VERSION="4.2.3"
 BR2_KERNEL_HEADERS_4_2=y
 BR2_LINUX_KERNEL_PATCH="$(BR2_EXTERNAL)/linux"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y