soc/intel/cannonlake: Correct number of root ports for CNL PCH H

CNL PCH H supports maximum 24 root ports while CNL PCH LP supports
maximum 16 root ports.

Change-Id: I2cc3ae282d4eb5da8b0618451e062a6c061f1d6f
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-on: https://review.coreboot.org/28399
Reviewed-by: Naresh Solanki <naresh.solanki@intel.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/cannonlake/Kconfig

@@ -164,6 +164,7 @@ config NHLT_DA7219
 
 config MAX_ROOT_PORTS
 	int
+	default 24 if CANNONLAKE_SOC_PCH_H
 	default 16
 
 config SMM_TSEG_SIZE