linux-yocto: Adds new bbappend for genericx86 and genericx86-64 BSPs to support kernel 4.8

(From meta-yocto rev: a96837d7bc42b8710ca5ac687191f03540279fad)

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-yocto-bsp/conf/machine/genericx86-64.conf

@@ -6,3 +6,5 @@
 DEFAULTTUNE ?= "core2-64"
 require conf/machine/include/tune-core2.inc
 require conf/machine/include/genericx86-common.inc
+
+PREFERRED_VERSION_linux-yocto_genericx86-64 ?= "4.8%"

meta-yocto-bsp/conf/machine/genericx86.conf

@@ -8,3 +8,5 @@ require conf/machine/include/tune-core2.inc
 require conf/machine/include/genericx86-common.inc
 
 MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += "gma500-gfx-check"
+
+PREFERRED_VERSION_linux-yocto_genericx86 ?= "4.8%"

meta-yocto-bsp/recipes-kernel/linux/linux-yocto_4.8.bbappend

@@ -0,0 +1,14 @@
+KBRANCH_genericx86  = "standard/base"
+KBRANCH_genericx86-64  = "standard/base"
+
+KMACHINE_genericx86 ?= "common-pc"
+KMACHINE_genericx86-64 ?= "common-pc-64"
+
+SRCREV_machine_genericx86    ?= "a7d71794e4e38d2f861c1b1dbff761ae0b0836b3"
+SRCREV_machine_genericx86-64 ?= "a7d71794e4e38d2f861c1b1dbff761ae0b0836b3"
+
+COMPATIBLE_MACHINE_genericx86 = "genericx86"
+COMPATIBLE_MACHINE_genericx86-64 = "genericx86-64"
+
+LINUX_VERSION_genericx86 = "4.8-rc4"
+LINUX_VERSION_genericx86-64 = "4.8-rc4"