um/x86: merge (and trim) 32- and 64-bit variants of ptrace.h

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/x86/um/asm/elf.h b/arch/x86/um/asm/elf.h
index f3b0633..0e07adc 100644
--- a/arch/x86/um/asm/elf.h
+++ b/arch/x86/um/asm/elf.h
@@ -34,25 +34,25 @@
 #define ELF_ARCH        EM_386
 
 #define ELF_PLAT_INIT(regs, load_addr) do { \
-	PT_REGS_EBX(regs) = 0; \
-	PT_REGS_ECX(regs) = 0; \
-	PT_REGS_EDX(regs) = 0; \
-	PT_REGS_ESI(regs) = 0; \
-	PT_REGS_EDI(regs) = 0; \
-	PT_REGS_EBP(regs) = 0; \
-	PT_REGS_EAX(regs) = 0; \
+	PT_REGS_BX(regs) = 0; \
+	PT_REGS_CX(regs) = 0; \
+	PT_REGS_DX(regs) = 0; \
+	PT_REGS_SI(regs) = 0; \
+	PT_REGS_DI(regs) = 0; \
+	PT_REGS_BP(regs) = 0; \
+	PT_REGS_AX(regs) = 0; \
 } while (0)
 
 /* Shamelessly stolen from include/asm-i386/elf.h */
 
 #define ELF_CORE_COPY_REGS(pr_reg, regs) do {	\
-	pr_reg[0] = PT_REGS_EBX(regs);		\
-	pr_reg[1] = PT_REGS_ECX(regs);		\
-	pr_reg[2] = PT_REGS_EDX(regs);		\
-	pr_reg[3] = PT_REGS_ESI(regs);		\
-	pr_reg[4] = PT_REGS_EDI(regs);		\
-	pr_reg[5] = PT_REGS_EBP(regs);		\
-	pr_reg[6] = PT_REGS_EAX(regs);		\
+	pr_reg[0] = PT_REGS_BX(regs);		\
+	pr_reg[1] = PT_REGS_CX(regs);		\
+	pr_reg[2] = PT_REGS_DX(regs);		\
+	pr_reg[3] = PT_REGS_SI(regs);		\
+	pr_reg[4] = PT_REGS_DI(regs);		\
+	pr_reg[5] = PT_REGS_BP(regs);		\
+	pr_reg[6] = PT_REGS_AX(regs);		\
 	pr_reg[7] = PT_REGS_DS(regs);		\
 	pr_reg[8] = PT_REGS_ES(regs);		\
 	/* fake once used fs and gs selectors? */	\
@@ -130,13 +130,13 @@
 #define ELF_ARCH        EM_X86_64
 
 #define ELF_PLAT_INIT(regs, load_addr)    do { \
-	PT_REGS_RBX(regs) = 0; \
-	PT_REGS_RCX(regs) = 0; \
-	PT_REGS_RDX(regs) = 0; \
-	PT_REGS_RSI(regs) = 0; \
-	PT_REGS_RDI(regs) = 0; \
-	PT_REGS_RBP(regs) = 0; \
-	PT_REGS_RAX(regs) = 0; \
+	PT_REGS_BX(regs) = 0; \
+	PT_REGS_CX(regs) = 0; \
+	PT_REGS_DX(regs) = 0; \
+	PT_REGS_SI(regs) = 0; \
+	PT_REGS_DI(regs) = 0; \
+	PT_REGS_BP(regs) = 0; \
+	PT_REGS_AX(regs) = 0; \
 	PT_REGS_R8(regs) = 0; \
 	PT_REGS_R9(regs) = 0; \
 	PT_REGS_R10(regs) = 0; \