Revert "SELinux: Set to permissive using CMDLINE from kernel config"

This reverts commit c1c0c3915aad2906b0e8f530be3e845e047c5b13.
Revert "rwsem.h: R/W semaphores implemented using ARM atomic functions"

This reverts commit 83c925fd5edf19735b38cc6083270a1a4c2f0413.