mm/hwpoison: return -EFAULT when copy fail in copy_mc_[user]_highpage()

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8M74H


CVE: NA

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If hardware errors are encountered during page copying, returning the bytes
not copied is not meaningful, and the caller cannot do any processing on
the remaining data. Returning -EFAULT is more reasonable, which represents
a hardware error encountered during the copying.

Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>