rpi-cmdline: Limit earlycon configuration to Pi4 family

At this moment, when building with OS_DEVELOPMENT=1, earlycon is added
to kernel command line, however the current configuration is only
valid on the Pi4 family. Using it with any other device type will make
the kernel hang.

This patch limits the configuration to Pi4, Pi400 and CM4.

Change-type: patch
Signed-off-by: Michal Toman <michalt@balena.io>

layers/meta-balena-raspberrypi/recipes-bsp/bootfiles/rpi-cmdline.bbappend

@@ -1,7 +1,12 @@
 # Set console accordingly to build type
 CMDLINE += " dwc_otg.lpm_enable=0 rootwait"
 CMDLINE += "${OS_KERNEL_CMDLINE} ${@oe.utils.conditional('SIGN_API','','',"${OS_KERNEL_SECUREBOOT_CMDLINE}",d)}"
-CMDLINE =+ " ${@bb.utils.contains('DISTRO_FEATURES','osdev-image',"earlycon=uart8250,mmio32,0xfe215040 console=tty1","",d)}"
+
+# Add earlycon with OS_DEVELOPMENT=1
+CMDLINE:prepend:raspberrypi4-64 = " ${@bb.utils.contains('DISTRO_FEATURES','osdev-image',"earlycon=uart8250,mmio32,0xfe215040 console=tty1","",d)}"
+CMDLINE:prepend:raspberrypi400-64 = " ${@bb.utils.contains('DISTRO_FEATURES','osdev-image',"earlycon=uart8250,mmio32,0xfe215040 console=tty1","",d)}"
+CMDLINE:prepend:raspberrypicm4-ioboard = " ${@bb.utils.contains('DISTRO_FEATURES','osdev-image',"earlycon=uart8250,mmio32,0xfe215040 console=tty1","",d)}"
+CMDLINE:prepend:raspberrypicm4-ioboard-sb = " ${@bb.utils.contains('DISTRO_FEATURES','osdev-image',"earlycon=uart8250,mmio32,0xfe215040 console=tty1","",d)}"
 
 # See https://github.com/raspberrypi/linux/commit/9b0efcc1ec497b2985c6aaa60cd97f0d2d96d203
 CMDLINE += " cgroup_enable=memory"