ACPI: EC: Separate delays for MSI hardware

MSI notebooks require very strict delays, while all others
are happy with msleep().

References: http://bugzilla.kernel.org/show_bug.cgi?id=9998

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>