genericx86*: allow higher tunes

Similar to changes in oe-core for the qemux86* machines, allow users
to set higher tuning levels for the genericx86 targets without changing
the default.

(From meta-yocto rev: 1b29b8168584420a858e2897ba2b0c332dae51bf)

Signed-off-by: Dan McGregor <dan.mcgregor@usask.ca>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

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

@@ -3,7 +3,7 @@
 #@DESCRIPTION: Machine configuration for generic x86_64 (64-bit) PCs and servers. Supports a moderately wide range of drivers that should boot and be usable on "typical" hardware.
 
 DEFAULTTUNE ?= "core2-64"
-require conf/machine/include/x86/tune-core2.inc
+require conf/machine/include/x86/tune-x86-64-v3.inc
 require conf/machine/include/genericx86-common.inc
 
 #For runqemu

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

@@ -3,7 +3,7 @@
 #@DESCRIPTION: Machine configuration for generic x86 (32-bit) PCs. Supports a moderately wide range of drivers that should boot and be usable on "typical" hardware.
 
 DEFAULTTUNE ?= "core2-32"
-require conf/machine/include/x86/tune-core2.inc
+require conf/machine/include/x86/tune-corei7.inc
 require conf/machine/include/genericx86-common.inc
 
 #For runqemu