ARC: Fixup the current ABI version

The upstream kernel ABI (v3) is different from current out-of-tree (v2):
* no-legacy-syscalls
* user_regs_struct layout has changed

So we rev up the ABI version
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/include/asm/elf.h

@@ -16,7 +16,7 @@
 /* Machine specific ELF Hdr flags */
 #define EF_ARC_OSABI_MSK	0x00000f00
 #define EF_ARC_OSABI_ORIG	0x00000000   /* MUST be zero for back-compat */
-#define EF_ARC_OSABI_V2		0x00000200
+#define EF_ARC_OSABI_CURRENT	0x00000300   /* v3 (no legacy syscalls) */
 
 /* ARC Relocations (kernel Modules only) */
 #define  R_ARC_32		0x4

arch/arc/kernel/process.c

@@ -224,7 +224,7 @@ int elf_check_arch(const struct elf32_hdr *x)
 		return 0;
 
 	eflags = x->e_flags;
-	if ((eflags & EF_ARC_OSABI_MSK) < EF_ARC_OSABI_V2) {
+	if ((eflags & EF_ARC_OSABI_MSK) < EF_ARC_OSABI_CURRENT) {
 		pr_err("ABI mismatch - you need newer toolchain\n");
 		force_sigsegv(SIGSEGV, current);
 		return 0;