net: hns3: change the function return type from int to bool

hclge_only_alloc_priv_buff() only return true or false,
So, change the function return type from integer to boolean.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Link: https://patch.msgid.link/20250815100414.949752-3-shaojijie@huawei.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>