sw64: add MIGHT_HAVE_PC_SERIO option to control selection of i8042

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I56OLG



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Since using i8042 drivers on sw64 would cause kernel crash, we add
MIGHT_HAVE_PC_SERIO option to control selection of i8042.

Signed-off-by: Gu Zitao <guzitao@wxiat.com>