soc/intel/cannonlake: Fix DSDT compile remarks

The following remarks show up during cannonlake based platform coreboot
build:
dsdt.asl     55:  Offset (0x00),
Remark   2158 -          ^ Unnecessary/redundant use of Offset operator

dsdt.asl    136:   Offset (0xa8),
Remark   2158 -          ^ Unnecessary/redundant use of Offset operator

Address those two remarks in coreboot.

BUG=N/A
TEST=Build coreboot and check build log to see no more remark.

Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Change-Id: Iad660347b32d90ac1176654820375e30a21b5ffe
Reviewed-on: https://review.coreboot.org/c/31666
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Bora Guvendik <bora.guvendik@intel.com>

src/soc/intel/cannonlake/acpi/globalnvs.asl

@@ -32,7 +32,6 @@ OperationRegion (GNVS, SystemMemory, NVSA, 0x2000)
 Field (GNVS, ByteAcc, NoLock, Preserve)
 {
 	/* Miscellaneous */
-	Offset (0x00),
 	OSYS,	16,	// 0x00 - Operating System
 	SMIF,	8,	// 0x02 - SMI function
 	PCNT,	8,	// 0x03 - Processor Count

src/soc/intel/cannonlake/acpi/northbridge.asl

@@ -54,11 +54,9 @@ Device (MCHC)
 		, 11,
 		DIBR, 20,	/* DMIBAR [31:12] */
 
-		Offset (0xa0),	/* Top of Used Memory */
+		Offset (0xa0),
-		TOM, 64,
+		TOM, 64,	/* Top of Used Memory */
-
+		TUUD, 64,	/* Top of Upper Used Memory */
-		Offset (0xa8),	/* Top of Upper Used Memory */
-		TUUD, 64,
 
 		Offset (0xbc),	/* Top of Low Used Memory */
 		TLUD, 32,