soc/amd/phoenix/chip.h: guard FSP-specific data structures

Since the USB configuration data structure is FSP-specific, add guards
on this part of the soc_amd_phoenix_config struct and the corresponding
include.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6c324421fbc3dc7b9a7bf6f5868785e9718147a5
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80298
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/phoenix/chip.h

@@ -13,7 +13,9 @@
 #include <soc/southbridge.h>
 #include <drivers/i2c/designware/dw_i2c.h>
 #include <types.h>
+#if CONFIG(PLATFORM_USES_FSP2_0)
 #include <vendorcode/amd/fsp/phoenix/FspUsb.h>
+#endif
 
 struct soc_amd_phoenix_config {
 	struct soc_amd_common_config common_config;
@@ -103,8 +105,10 @@ struct soc_amd_phoenix_config {
 		DXIO_PSPP_POWERSAVE,
 	} pspp_policy;
 
+#if CONFIG(PLATFORM_USES_FSP2_0)
 	uint8_t usb_phy_custom;
 	struct usb_phy_config usb_phy;
+#endif
 };
 
 #endif /* PHOENIX_CHIP_H */