kernel: Update to latest

Fixes for SPI1 strapping, device tree additions for Zaius and cleanups
of unneeded hacks in the board file.

  arm: aspeed: Remove SPI1 strapping hacks
  arm: dts: aspeed: Set SPI1 mode to master
  arm: aspeed: Remove SPI controller hacks
  arm: aspeed: Remove setting of SCU90 from common
  arm: aspeed: Remove Palmetto SCU hack
  arm: aspeed: Remove MDIO hack
  pinctrl: aspeed: Enable ASPEED pinctrl driver to modify SPI1 strap bits
  arm: dts: ast2500-evb: Mux MDIO pins
  ARM: dts: aspeed: zaius: Add UCD90160 power sequencer
  ARM: dts: aspeed: zaius: Update with new spi-nor binding

Change-Id: Ic399b13ef206f2dc78d652f1f8b7dfd85219ecf3
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/common/recipes-kernel/linux/linux-obmc_4.7.bb b/common/recipes-kernel/linux/linux-obmc_4.7.bb
index d3d2a7f..af4bddc 100644
--- a/common/recipes-kernel/linux/linux-obmc_4.7.bb
+++ b/common/recipes-kernel/linux/linux-obmc_4.7.bb
@@ -1,5 +1,5 @@
 KBRANCH ?= "dev-4.7"
 LINUX_VERSION ?= "4.7"
-SRCREV="c5682cbc3542add705e35152329436067bb1f94a"
+SRCREV="8c7da38063c14868eab25e9d3273b6e6c304f4be"
 
 require linux-obmc.inc