openEuler inclusion
category: bugfix
bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=339
CVE: NA
Reference: https://gitee.com/openeuler/kernel/issues/I3U11D

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This fix check return value of acpi_get_table().

MPAM driver need to check return value, thus we need to check
the return value of acpi_get_table(ACPI_SIG_PPTT, 0, &pptt).
Signed-off-by: Nmpiglet <mpiglet@outlook.com>
Reviewed-by: Jian Cheng <cj.chengjian(a)huawei.com>
Signed-off-by: NWang ShaoBo <bobo.shaobowang@huawei.com>