sb/amd/pi/hudson/acpi/lpc.asl: Convert to ASL 2.0

Change-Id: Id50b9a0f0e3f90f5288b420280d762b8a86a6527
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50326
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/southbridge/amd/pi/hudson/acpi/lpc.asl

@@ -28,8 +28,8 @@ Device(LIBR) {
 		{
 			CreateDwordField(^CRS,^BAR0._BAS,SPIB)	// Field to hold SPI base address
 			CreateDwordField(^CRS,^BAR0._LEN,SPIL)	// Field to hold SPI address length
-			Store(BAR,SPIB)		// SPI base address mapped
-			Store(0x1000,SPIL)	// 4k space mapped
+			SPIB = BAR				// SPI base address mapped
+			SPIL = 0x1000				// 4k space mapped
 			Return(CRS)
 		}
 	}