perf: hns3: default use hardware event 0 as group leader event.

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7BY7T


CVE: NA

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For hns3 pmu events, we use command as below before:
perf stat -g -e hns3_pmu_sicl_0/config=0x00105,global=1/
-e hns3_pmu_sicl_0/config=0x10105,global=1/ -I 1000

We want 0x00105 event and 0x10105 event share a hardware event, but for
kernel 6.2 'commit 5f8f9567 ("perf evlist: Remove group option.")'
remove -g parameter.

So add this patch to set default related event idx as 0 to share
the first hardware event.

Fixes: 66637ab1 ("drivers/perf: hisi: add driver for HNS3 PMU")
Signed-off-by: Hao Chen <chenhao418@huawei.com>