loop/010: skip when kernel is older than v6.11

Patch fixing test case issue which use to failed in old kernel, this
patch skip test case if test runs in older kernel less than 6.11

log:

[root@linux blktests]#  ./check loop/010
loop/010 (check stale loop partition)                        [not run]
    Kernel version too old

Signed-off-by: Praveen K Pandey <praveen@linux.vnet.ibm.com>
[Shin'ichiro: fixed trailing space, indent tab and commit message]
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>

tests/loop/010

@@ -11,6 +11,7 @@ DESCRIPTION="check stale loop partition"
 TIMED=1
 
 requires() {
+	_have_kver 6 11
 	_have_program parted
 	_have_program mkfs.xfs
 }