Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/sh/include/asm/flat.h b/arch/sh/include/asm/flat.h
index 275fcae..fee4f25 100644
--- a/arch/sh/include/asm/flat.h
+++ b/arch/sh/include/asm/flat.h
@@ -1,24 +1,18 @@
-/*
+/* SPDX-License-Identifier: GPL-2.0
+ *
  * include/asm-sh/flat.h
  *
  * uClinux flat-format executables
  *
  * Copyright (C) 2003  Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive for
- * more details.
  */
 #ifndef __ASM_SH_FLAT_H
 #define __ASM_SH_FLAT_H
 
 #include <asm/unaligned.h>
 
-#define	flat_argvp_envp_on_stack()		0
-#define	flat_old_ram_flag(flags)		(flags)
-#define	flat_reloc_valid(reloc, size)		((reloc) <= (size))
 static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
-					u32 *addr, u32 *persistent)
+					u32 *addr)
 {
 	*addr = get_unaligned((__force u32 *)rp);
 	return 0;
@@ -28,8 +22,6 @@
 	put_unaligned(addr, (__force u32 *)rp);
 	return 0;
 }
-#define	flat_get_relocate_addr(rel)		(rel)
-#define	flat_set_persistent(relval, p)		({ (void)p; 0; })
 
 #define FLAT_PLAT_INIT(_r) \
   do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \