wedge100: bump kernel version to 5.6.19

Summary: Update wedge100 BMC kernel version from 4.1.51 to 5.6.19.

Test Plan:
1) openbmc CIT passed.
2) I2C devices are GPIO pins are initialized properly at bootup.
3) BMC eth0 works (pingable and sshable).

Reviewed By: williamspatrick

fbshipit-source-id: f1862c4fe1

meta-facebook/meta-wedge100/conf/machine/wedge100.conf

@@ -11,6 +11,10 @@ PREFERRED_VERSION_u-boot = "v2016.07"
 PREFERRED_VERSION_u-boot-mkimage = "v2016.07"
 PREFERRED_VERSION_u-boot-fw-utils = "v2016.07"
 
+KERNEL_DEVICETREE = "aspeed-bmc-facebook-wedge100.dtb"
+PREFERRED_VERSION_linux-aspeed = "5.6.19"
+PREFERRED_VERSION_libwatchdog = "0.2"
+
 # configuration for preferred version of packages
 PREFERRED_VERSION_libipmi = "0.2"
 PREFERRED_VERSION_ipmid = "0.2"
@@ -20,7 +24,6 @@ PREFERRED_VERSION_bcm5396-util = "0.1"
 PREFERRED_VERSION_openbmc-gpio = "0.2"
 PREFERRED_VERSION_kcsd = "0.2"
 PREFERRED_VERSION_fscd = "0.3"
-PREFERRED_VERSION_libwatchdog = "0.1"
 PREFERRED_VERSION_libpal = "0.2"
 
 MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "           \