rauc: add support for SECO Alvin board (aka B68)

For the moment this allows booting from USB storage. Ideally we would
have one config that works for eMMC, nvme, USB and SATA but we're not
there yet.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@huawei.com>

meta-oniro-core/recipes-core/rauc/rauc_%.bbappend

@@ -31,6 +31,10 @@ RAUC_COMPAT:qemux86-64 := "QEMU x86-64"
 RAUC_SLOT_A:qemux86-64 := "/dev/sda2"
 RAUC_SLOT_B:qemux86-64 := "/dev/sda3"
 
+RAUC_COMPAT:seco-intel-b68 := "SECO Alvin"
+RAUC_SLOT_A:seco-intel-b68 := "/dev/sda2"
+RAUC_SLOT_B:seco-intel-b68 := "/dev/sda3"
+
 do_install:prepend() {
     sed \
         -e 's,@RAUC_COMPAT@,${RAUC_COMPAT},g' \