irqdomain: Fix driver re-inserting failures when IRQs not being freed

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5GNIE

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Since commit 4615fbc3 ("genirq/irqdomain: Don't try to free an
interrupt that has no mapping"), we have found failures when
re-inserting some specific drivers:

[root@localhost ~]# rmmod hisi_sas_v3_hw
[root@localhost ~]# modprobe hisi_sas_v3_hw
[ 1295.622525] hisi_sas_v3_hw: probe of 0000:30:04.0 failed with error -2

A relevant discussion can be found at:
https://lore.kernel.org/lkml/3d3d0155e66429968cb4f6b4feeae4b3@kernel.org/



This is because IRQs from a low-level domain are not freed together,
leaving some leaked. Thus, the next driver insertion fails to allocate
the same number of IRQs.

Free a contiguous group of IRQs in one go to fix this issue.

Fixes: 4615fbc3 ("genirq/irqdomain: Don't try to free an interrupt
that has no mapping")
Signed-off-by: Jie Zhan <zhanjie9@hisilicon.com>
Reviewed-by: Liao Chang <liaochang1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>