riscv: clean up the macro format in each header file

There are many different formats in each header now, such as
_ASM_XXX_H, __ASM_XXX_H, _ASM_RISCV_XXX_H, RISCV_XXX_H, etc., This patch
tries to unify the format by using _ASM_RISCV_XXX_H, because the most
header use it now. This patch also adds the conditional to the headers
if they lost it.

Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>

arch/riscv/include/uapi/asm/elf.h

@@ -9,8 +9,8 @@
  * (at your option) any later version.
  */
 
-#ifndef _UAPI_ASM_ELF_H
-#define _UAPI_ASM_ELF_H
+#ifndef _UAPI_ASM_RISCV_ELF_H
+#define _UAPI_ASM_RISCV_ELF_H
 
 #include <asm/ptrace.h>
 
@@ -95,4 +95,4 @@ typedef union __riscv_fp_state elf_fpregset_t;
 #define R_RISCV_32_PCREL	57
 
 
-#endif /* _UAPI_ASM_ELF_H */
+#endif /* _UAPI_ASM_RISCV_ELF_H */

arch/riscv/include/uapi/asm/hwcap.h

@@ -5,8 +5,8 @@
  * Copyright (C) 2012 ARM Ltd.
  * Copyright (C) 2017 SiFive
  */
-#ifndef __UAPI_ASM_HWCAP_H
-#define __UAPI_ASM_HWCAP_H
+#ifndef _UAPI_ASM_RISCV_HWCAP_H
+#define _UAPI_ASM_RISCV_HWCAP_H
 
 /*
  * Linux saves the floating-point registers according to the ISA Linux is
@@ -22,4 +22,4 @@
 #define COMPAT_HWCAP_ISA_D	(1 << ('D' - 'A'))
 #define COMPAT_HWCAP_ISA_C	(1 << ('C' - 'A'))
 
-#endif
+#endif /* _UAPI_ASM_RISCV_HWCAP_H */

arch/riscv/include/uapi/asm/ucontext.h

@@ -5,8 +5,8 @@
  *
  * This file was copied from arch/arm64/include/uapi/asm/ucontext.h
  */
-#ifndef _UAPI__ASM_UCONTEXT_H
-#define _UAPI__ASM_UCONTEXT_H
+#ifndef _UAPI_ASM_RISCV_UCONTEXT_H
+#define _UAPI_ASM_RISCV_UCONTEXT_H
 
 #include <linux/types.h>
 
@@ -31,4 +31,4 @@ struct ucontext {
 	struct sigcontext uc_mcontext;
 };
 
-#endif /* _UAPI__ASM_UCONTEXT_H */
+#endif /* _UAPI_ASM_RISCV_UCONTEXT_H */