arm64: mm: Do not show info during startup if pbha is not enabled

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I96IZH



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Do not show pbha related info during startup if pbha is not properly
enabled. Param pbha is checked during efi-stub and kernel startup, however
any param starts with "pbha" can lead to pbha related log info while pbha
is not enabled since only "enable" or "user" is accepted by kernel. To
solve this problem, only show this info if accepted args is passed to
kernel.

Fixes: 3bef1e33 ("arm64: mm: Introduce kernel param pbha")
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>