alpha: remove CONFIG_OSF4_COMPAT flag from syscall table

Remove CONFIG_OSF4_COMPAT config flag from system call
table - systbls.S and to keep the same feature, add the
flag in osf_sys.c.

One of the patch in this patch series will generate the
system call table file. In order to come up with a common
implementation across all architecture, we need this change.
Signed-off-by: Firoz Khan <firoz.khan@linaro.org>
Signed-off-by: Matt Turner <mattst88@gmail.com>

arch/alpha/kernel/osf_sys.c

@@ -1343,7 +1343,6 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
 }
 
 #ifdef CONFIG_OSF4_COMPAT
-
 /* Clear top 32 bits of iov_len in the user's buffer for
    compatibility with old versions of OSF/1 where iov_len
    was defined as int. */
@@ -1360,27 +1359,31 @@ osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
 	}
 	return 0;
 }
+#endif
 
 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
 		const struct iovec __user *, vector, unsigned long, count)
 {
+#ifdef CONFIG_OSF4_COMPAT
 	if (unlikely(personality(current->personality) == PER_OSF4))
 		if (osf_fix_iov_len(vector, count))
 			return -EFAULT;
+#endif
+
 	return sys_readv(fd, vector, count);
 }
 
 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
 		const struct iovec __user *, vector, unsigned long, count)
 {
+#ifdef CONFIG_OSF4_COMPAT
 	if (unlikely(personality(current->personality) == PER_OSF4))
 		if (osf_fix_iov_len(vector, count))
 			return -EFAULT;
+#endif
 	return sys_writev(fd, vector, count);
 }
 
-#endif
-
 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
 {
 	int prio = sys_getpriority(which, who);

arch/alpha/kernel/systbls.S

@@ -132,13 +132,8 @@ sys_call_table:
 	.quad sys_osf_getrusage
 	.quad sys_getsockopt
 	.quad sys_ni_syscall
-#ifdef CONFIG_OSF4_COMPAT
 	.quad sys_osf_readv			/* 120 */
 	.quad sys_osf_writev
-#else
-	.quad sys_readv				/* 120 */
-	.quad sys_writev
-#endif
 	.quad sys_osf_settimeofday
 	.quad sys_fchown
 	.quad sys_fchmod