sepolicy: Allow kernel to write block_device

Change-Id: I04c6b747dbccb7bb6036d26076e0b03df4160915
diff --git a/basic/non_plat/kernel.te b/basic/non_plat/kernel.te
index 5831906..8085697 100644
--- a/basic/non_plat/kernel.te
+++ b/basic/non_plat/kernel.te
@@ -85,3 +85,5 @@
 
 # Date: WK19.03
 allow kernel expdb_block_device:blk_file rw_file_perms;
+
+allow kernel block_device:blk_file rw_file_perms;