Merge Linux 4.4.245 kernel

Changes in 4.4.245: (16 commits)
        powerpc/64s: Define MASKABLE_RELON_EXCEPTION_PSERIES_OOL
        powerpc/64s: move some exception handlers out of line
        powerpc/64s: flush L1D on kernel entry
        powerpc: Add a framework for user access tracking
        powerpc: Implement user_access_begin and friends
        powerpc: Fix __clear_user() with KUAP enabled
        powerpc/uaccess: Evaluate macro arguments once, before user access is allowed
        powerpc/64s: flush L1D after user accesses
        i2c: imx: Fix external abort on interrupt in exit paths
        xfs: catch inode allocation state mismatch corruption
        xfs: validate cached inodes are free when allocated
        powerpc/8xx: Always fault when _PAGE_ACCESSED is not set
        Input: sunkbd - avoid use-after-free in teardown paths
        mac80211: always wind down STA state
        KVM: x86: clflushopt should be treated as a no-op by emulation
        Linux 4.4.245

Conflicts:
	arch/powerpc/include/asm/uaccess.h