u-boot: Upgrade AST2400 machines to 2016.05 tree.

Move 2016.05 tree to point at the latest openbmc commit and point
all AST2400 machines to it.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meta-openbmc-bsp/meta-aspeed/meta-ast2400/conf/machine/include/ast2400.inc b/meta-openbmc-bsp/meta-aspeed/meta-ast2400/conf/machine/include/ast2400.inc
index 8510a03..d67959a 100644
--- a/meta-openbmc-bsp/meta-aspeed/meta-ast2400/conf/machine/include/ast2400.inc
+++ b/meta-openbmc-bsp/meta-aspeed/meta-ast2400/conf/machine/include/ast2400.inc
@@ -4,10 +4,10 @@
 
 PREFERRED_PROVIDER_virtual/kernel ?= "linux-obmc"
 PREFERRED_VERSION_linux-obmc ?= "4.4+git%"
-PREFERRED_VERSION_u-boot ?= "v2013.07+git%"
-PREFERRED_VERSION_u-boot-fw-utils ?= "v2013.07+git%"
+PREFERRED_VERSION_u-boot ?= "v2016.05+git%"
+PREFERRED_VERSION_u-boot-fw-utils ?= "v2016.05+git%"
 
-UBOOT_MACHINE ?= "palmetto_config"
+UBOOT_MACHINE ?= "ast_g4_config"
 UBOOT_ENTRYPOINT ?= "0x40001000"
 UBOOT_LOADADDRESS ?= "0x40001000"