opicm4: Support current branch

external/config/boards/orangepicm4.conf

@@ -2,7 +2,7 @@
 BOARD_NAME="OPI CM4"
 BOARDFAMILY="rockchip-rk356x"
 BOOTCONFIG="orangepi-cm4-rk3566_defconfig"
-KERNEL_TARGET="legacy"
+KERNEL_TARGET="legacy,current"
 BOOT_LOGO="desktop"
 BOOT_SUPPORT_SPI="yes"
 DISTRIB_TYPE_LEGACY="focal jammy bullseye bookworm raspi"