Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/nds32/include/asm/Kbuild b/arch/nds32/include/asm/Kbuild
index dbc4e54..77eae62 100644
--- a/arch/nds32/include/asm/Kbuild
+++ b/arch/nds32/include/asm/Kbuild
@@ -1,32 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0
 generic-y += asm-offsets.h
 generic-y += atomic.h
 generic-y += bitops.h
-generic-y += bitsperlong.h
-generic-y += bpf_perf_event.h
 generic-y += bug.h
 generic-y += bugs.h
 generic-y += checksum.h
-generic-y += clkdev.h
 generic-y += cmpxchg.h
-generic-y += cmpxchg-local.h
 generic-y += compat.h
-generic-y += cputime.h
 generic-y += device.h
 generic-y += div64.h
 generic-y += dma.h
 generic-y += dma-mapping.h
 generic-y += emergency-restart.h
-generic-y += errno.h
 generic-y += exec.h
 generic-y += export.h
 generic-y += fb.h
-generic-y += fcntl.h
-generic-y += ftrace.h
 generic-y += gpio.h
 generic-y += hardirq.h
 generic-y += hw_irq.h
-generic-y += ioctl.h
-generic-y += ioctls.h
 generic-y += irq.h
 generic-y += irq_regs.h
 generic-y += irq_work.h
@@ -34,20 +25,16 @@
 generic-y += kmap_types.h
 generic-y += kprobes.h
 generic-y += kvm_para.h
-generic-y += limits.h
 generic-y += local.h
+generic-y += local64.h
 generic-y += mm-arch-hooks.h
-generic-y += mman.h
+generic-y += mmiowb.h
 generic-y += parport.h
 generic-y += pci.h
 generic-y += percpu.h
 generic-y += preempt.h
 generic-y += sections.h
-generic-y += segment.h
 generic-y += serial.h
-generic-y += shmbuf.h
-generic-y += sizes.h
-generic-y += stat.h
 generic-y += switch_to.h
 generic-y += timex.h
 generic-y += topology.h