MinPlatformPkg/AcpiPlatform: Set X_GPE1_BLK GAS structure to zeroes

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3534

Updates the code to be compatible with a recent Firmware Test Suite
(FWTS) fix that improves adherence to the ACPI Specification.

Relevant FWTS commit:
https://git.launchpad.net/fwts/commit/

?
id=4ad3e374bf98931c84adcf6e523982b5ebb83748

Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Eric Dong <eric.dong@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>