soc/intel/meteorlake: Add missing entry for GSPI2

This patch adds missing ASL entry for GSPI2 device.

Change-Id: I8f8410947b77d1a9bab2fa5929f30c803a78266d
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70354
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Ivy Jian <ivy.jian@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/meteorlake/acpi/serialio.asl

@@ -50,6 +50,12 @@ Device (SPI1)
 	Name (_DDN, "Serial IO SPI Controller 1")
 }
 
+Device (SPI2)
+{
+	Name (_ADR, 0x00120006)
+	Name (_DDN, "Serial IO SPI Controller 2")
+}
+
 Device (UAR0)
 {
 	Name (_ADR, 0x001e0000)