rpi4b: re-enable legacy target

Author: EvilOlaf

config/boards/rpi4b.conf

@@ -4,8 +4,7 @@ declare -g BOARD_VENDOR="rpi-foundation"
 declare -g BOARDFAMILY="bcm2711"
 declare -g BOARD_MAINTAINER="PanderMusubi teknoid"
 declare -g INTRODUCED="2019"
-#declare -g KERNEL_TARGET="current,edge,legacy" # Jun 11th 2026, legacy broken, upstream issue
-declare -g KERNEL_TARGET="current,edge"
+declare -g KERNEL_TARGET="current,edge,legacy"
 declare -g ASOUND_STATE="asound.state.rpi"
 declare -g KERNEL_TEST_TARGET="current"
 declare -g MODULES="i2c_dev"