kernel: MTD fixes and Zaius dts updates

MTD fixes:
  ARM: dts: aspeed: restore labels of the flash modules
  ARM: dts: aspeed: resurrect PNOR on ast2500 evb

Resolves openbmc/openbmc#816

Zaius device tree additions. These two were supposed to be part of the
previous kernel bump but didn't make it:
  ARM: dts: aspeed: zaius: Add I2C master selector and hotswap controller
  ARM: dts: aspeed: zaius: Add 1-wire buses

Change-Id: I659a26a602f2bf419cb7d4d0fdff97e3f55d99c1
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 f05cceb..b9d2665 100644
--- a/common/recipes-kernel/linux/linux-obmc_4.7.bb
+++ b/common/recipes-kernel/linux/linux-obmc_4.7.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-4.7"
 LINUX_VERSION ?= "4.7"
 
-SRCREV="90f82cf8e49f31c2e38e7f1abf564a8f5d89f80d"
+SRCREV="6fcd70b7e3d37b9189c9cdbcb982cf0862f63dff"
 
 require linux-obmc.inc