Disable kmsg ratelimiting

... for better debuggability. Ideally this should be turned off for the
production builds.

Bug: 181936135
Test: start microdroid, watch the output.
Change-Id: Iebacf83b41af46918fdc1fd8de07ad6b3bd4abfa
diff --git a/microdroid/uboot-env.txt b/microdroid/uboot-env.txt
index d845086..d991a04 100644
--- a/microdroid/uboot-env.txt
+++ b/microdroid/uboot-env.txt
@@ -4,7 +4,7 @@
 bootcmd=boot_android virtio 0#misc
 
 # Kernel commandlines
-bootargs=rdinit=/bin/init_vendor panic=-1 androidboot.first_stage_console=1 androidboot.hardware=microdroid androidboot.boot_devices=10000.pci androidboot.selinux=permissive
+bootargs=rdinit=/bin/init_vendor panic=-1 printk.devkmsg=on androidboot.first_stage_console=1 androidboot.hardware=microdroid androidboot.boot_devices=10000.pci androidboot.selinux=permissive
 
 bootdelay=0
 fdtaddr=0x80000000