linux-yocto/4.1: generix86* bsp fix perf issue with gcc >=7

(From meta-yocto rev: 9e7a7a8dc6c1e08e973ee9f91bbad3b659e9848e)

Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-yocto-bsp/recipes-kernel/linux/linux-yocto_4.1.bbappend

@@ -7,8 +7,8 @@ KBRANCH_mpc8315e-rdb = "standard/fsl-mpc8315e-rdb"
 KMACHINE_genericx86 ?= "common-pc"
 KMACHINE_genericx86-64 ?= "common-pc-64"
 
-SRCREV_machine_genericx86    ?= "6fdc50d32489a335f65538bf3cff59ad7ac925f5"
-SRCREV_machine_genericx86-64 ?= "6fdc50d32489a335f65538bf3cff59ad7ac925f5"
+SRCREV_machine_genericx86    ?= "782133d8166ac71ef1ffaba58b7cf81ec9e532a1"
+SRCREV_machine_genericx86-64 ?= "782133d8166ac71ef1ffaba58b7cf81ec9e532a1"
 SRCREV_machine_edgerouter ?= "782133d8166ac71ef1ffaba58b7cf81ec9e532a1"
 SRCREV_machine_beaglebone ?= "ce38fdb820476e496579f2481be977c0f35509f4"
 SRCREV_machine_mpc8315e-rdb ?= "782133d8166ac71ef1ffaba58b7cf81ec9e532a1"