alpha: decode osf_statfs64 and osf_fstatfs64 syscalls

* linux/alpha/syscallent.h (osf_statfs64, osf_fstatfs64): Set nargs
and handler.
diff --git a/linux/alpha/syscallent.h b/linux/alpha/syscallent.h
index 69d252a..eaa316f 100644
--- a/linux/alpha/syscallent.h
+++ b/linux/alpha/syscallent.h
@@ -230,8 +230,8 @@
 [224] = { 5,	0,		SEN(printargs),			"osf_stat"		}, /*not implemented */
 [225] = { 5,	0,		SEN(printargs),			"osf_lstat"		}, /*not implemented */
 [226] = { 5,	0,		SEN(printargs),			"osf_fstat"		}, /*not implemented */
-[227] = { 5,	0,		SEN(printargs),			"osf_statfs64"		}, /*not implemented */
-[228] = { 5,	0,		SEN(printargs),			"osf_fstatfs64"		}, /*not implemented */
+[227] = { 3,	0,		SEN(osf_statfs),		"osf_statfs64"		}, /*not implemented */
+[228] = { 3,	0,		SEN(osf_fstatfs),		"osf_fstatfs64"		}, /*not implemented */
 [229 ... 232] = { },
 [233] = { 1,	0,		SEN(getpgid),			"getpgid"		},
 [234] = { 1,	0,		SEN(getsid),			"getsid"		},