soc/intel/tigerlake: Set MAX_CPUS for TGL-H to 16

TGL-H supports up to 8 cores (16 threads).

Change-Id: I2ee1be37f564bf1b6249a6c223be093747c38ab5
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57267
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/soc/intel/tigerlake/Kconfig

@@ -85,6 +85,7 @@ config CPU_SPECIFIC_OPTIONS
 
 config MAX_CPUS
 	int
+	default 16 if SOC_INTEL_TIGERLAKE_PCH_H
 	default 8
 
 config DCACHE_RAM_BASE