sb/intel/bd82x6x: Make space for USB port config in devicetree

This is the first step to:

- Move USB port configs, which are static, from C code to devicetree;
- Unify USB port configs between MRC and native code path.

Change-Id: I59af466d41790e2163342cac8676457ac19371ea
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81878
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/southbridge/intel/bd82x6x/chip.h

@@ -5,6 +5,7 @@
 
 #include <southbridge/intel/common/spi.h>
 #include <types.h>
+#include <southbridge/intel/bd82x6x/pch.h>
 
 struct southbridge_intel_bd82x6x_config {
 	/**
@@ -77,6 +78,7 @@ struct southbridge_intel_bd82x6x_config {
 	uint32_t spi_uvscc;
 	uint32_t spi_lvscc;
 	struct intel_swseq_spi_config spi;
+	struct southbridge_usb_port usb_port_config[14];
 };
 
 #endif				/* SOUTHBRIDGE_INTEL_BD82X6X_CHIP_H */