ARM: footbridge: fix dc21285 PCI configuration accessors
stable inclusion from stable-5.10.15 commit 384cddbee46f07b029c7b44622d504e6ec4b3e22 bugzilla: 48167 -------------------------------- commit 39d3454c upstream. Building with gcc 4.9.2 reveals a latent bug in the PCI accessors for Footbridge platforms, which causes a fatal alignment fault while accessing IO memory. Fix this by making the assembly volatile. Cc: stable@vger.kernel.org Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com> Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
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