[SRU] [xenial] xgene i2c slimpro driver fails to load

[Craig Magina]

Adding this driver fixes this issue seen via the error message:

xgene-slimpro-i2c soc:i2cslimpro: i2c mailbox channel request failed

This is work towards enabling in-band ipmi support on the merlin boards.

The following changes since commit 98f089cd0c739582ec20d561816f0a327c3c0f70:

  UBUNTU: Ubuntu-4.4.0-45.66 (2016-10-19 11:30:20 +0200)

are available in the git repository at:

  git://kernel.ubuntu.com/cmagina/xenial-xgene.git 1625232

for you to fetch changes up to aee1786d2e393980bc38b1e3a57c830eb7159a71:

  UBUNTU: [Config] Enabled XGENE_SLIMPRO_MBOX as a module (2016-10-26
13:29:24 +0000)

----------------------------------------------------------------
Axel Lin (1):
      mailbox: xgene-slimpro: Fix wrong test for devm_kzalloc

Craig Magina (1):
      UBUNTU: [Config] Enabled XGENE_SLIMPRO_MBOX as a module

Dan Carpenter (1):
      mailbox/xgene-slimpro: Checking for IS_ERR instead of NULL

Duc Dang (1):
      mailbox: Add support for APM X-Gene platform mailbox driver

 debian.master/config/config.common.ubuntu |   1 +
 drivers/mailbox/Kconfig                   |   9 +
 drivers/mailbox/Makefile                  |   2 +
 drivers/mailbox/mailbox-xgene-slimpro.c   | 284 ++++++++++++++++++++++++++++++
 4 files changed, 296 insertions(+)
 create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c

Craig Magina