ACPICA: Add KEYP table definition

ACPICA: Add KEYP table definition

Software uses this table to discover the base address of the Key
Configuration Unit (KCU) register block associated with each IDE capable
host bridge.

[1]: Root Complex IDE Key Configuration Unit Software Programming Guide
     https://cdrdv2.intel.com/v1/dl/getContent/732838

Link: https://github.com/acpica/acpica/commit/af970172e2dd
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3401908.44csPzL39Z@rafael.j.wysocki