kernel: DRM update, ASPEED misc registers, AST2500 clk fix

These updates are in preperation for the AST2500 GFX DRM driver merge,
and associated userspace tools.

Aishwarya Pant (1):
      drm: introduce drm_dev_{get/put} functions

Andrew Jeffery (3):
      soc: aspeed: Miscellaneous control interfaces
      dts: aspeed-g5: Expose VGA scratch registers
      dts: aspeed-g5: Expose SuperIO scratch registers

Joel Stanley (1):
      Merge tag 'drm-for-v4.14' into dev-4.13
      clk: aspeed: Support second reset register

Oleksandr Andrushchenko (1):
      drm/simple_kms_helper: Add {enable|disable}_vblank callback support

Change-Id: Ib6b4316397cedb9636243d0a7a51924d30bb811d
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-phosphor/common/recipes-kernel/linux/linux-obmc_4.13.bb b/meta-phosphor/common/recipes-kernel/linux/linux-obmc_4.13.bb
index 030b2d2..58f2485 100644
--- a/meta-phosphor/common/recipes-kernel/linux/linux-obmc_4.13.bb
+++ b/meta-phosphor/common/recipes-kernel/linux/linux-obmc_4.13.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-4.13"
 LINUX_VERSION ?= "4.13.16"
 
-SRCREV="a1340b5c31182ee3e191ac745f8e591badaeb586"
+SRCREV="e8b7a01a0b0f611d48cdba2471ae6fbddeed17f5"
 
 require linux-obmc.inc