Merge pull request #17 from jk-ozlabs/master

Updates for IPMI & i2c enablement
Add hostboot-binaries package env version/site overrides

Support environment override of HOSTBOOT_BINARIES_VERSION 
Support environment override of HOSTBOOT_BINARIES_SITE
Add hostboot package env version/site overrides

Support environment override of HOSTBOOT_VERSION 
Support environment override of HOSTBOOT_SITE
Add ffs package env version/site overrides

Support environment override of OPENPOWER_FFS_VERSION 
Support environment override of OPENPOWER_FFS_SITE
Add pnor package env version/site overrides

Support environment override of OPENPOWER_PNOR_VERSION 
Support environment override of OPENPOWER_PNOR_SITE
Add targeting package env version/site overrides

Support environment override of OPENPOWER_TARGETING_VERSION
Support environment override of OPENPOWER_TARGETING_SITE
Merge pull request #18 from bofferdn/optional-settings-2

Optional settings 2
Palmetto Live VPD
Merge pull request #20 from brs332/master

Palmetto Live VPD
Update pnor and targeting commits.
Update hostboot for PNOR ECC bug.
Update buildroot to 0425b33c

Jeremy Kerr (1):
      firmware/skiboot: Update to 3cf5a096

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
configs/palmetto_defconfig: Update linux to c19b3f5d

Benjamin Herrenschmidt (3):
      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

Jeremy Kerr (2):
      powerpc/configs: Add I2C_CHARDEV to skiroot_defconfig
      powerpc/configs/skiroot_defconfig: Fix invalid config changes

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

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>