Revert: ACPI / EC: Add support to disallow QR_EC to be issued before completing previous QR_EC

This reverts commit 2dbfff81, which
really is commit 558e4736 upstream.

Sorry for the confusion, this got applied twice, and reverted once, this
is the second revert and I hope to never touch it again...

Reported-by: Lv Zheng <lv.zheng@intel.com>
Cc: Alexander Mezin <mezin.alexander@gmail.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>