mb/google/fizz: add variant chipset display init

The Endeavour variant does not have a DisplayPort input so there's no
need to wait for it.

BUG=b:147830399
BRANCH=none
TEST=boot endeavour; check coreboot logs

Signed-off-by: Jeff Chase <jnchase@google.com>
Change-Id: I30c7c47f19a61ce66c6c923864d80870d2761859
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42085
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Shelley Chen <shchen@google.com>

src/mainboard/google/fizz/mainboard.c

@@ -250,10 +250,8 @@ static void wait_for_hpd(gpio_t gpio, long timeout)
 	       stopwatch_duration_msecs(&sw));
 }
 
-static void mainboard_chip_init(void *chip_info)
+void __weak variant_chip_display_init(void)
 {
-	const struct pad_config *pads;
-	size_t num;
 	static const long display_timeout_ms = 3000;
 
 	/* This is reconfigured back to whatever FSP-S expects by
@@ -264,6 +262,14 @@ static void mainboard_chip_init(void *chip_info)
 		if (google_chromeec_wait_for_displayport(display_timeout_ms))
 			wait_for_hpd(GPIO_DP_HPD, display_timeout_ms);
 	}
+}
+
+static void mainboard_chip_init(void *chip_info)
+{
+	const struct pad_config *pads;
+	size_t num;
+
+	variant_chip_display_init();
 
 	pads = variant_gpio_table(&num);
 	gpio_configure_pads(pads, num);

src/mainboard/google/fizz/variants/baseboard/include/baseboard/variants.h

@@ -23,4 +23,6 @@ void variant_nhlt_init(struct nhlt *nhlt);
 void variant_nhlt_oem_overrides(const char **oem_id, const char **oem_table_id,
 				uint32_t *oem_revision);
 
+void variant_chip_display_init(void);
+
 #endif /* __BASEBOARD_VARIANTS_H__ */

src/mainboard/google/fizz/variants/endeavour/Makefile.inc

@@ -1,4 +1,4 @@
 bootblock-y += gpio.c
 
 ramstage-y += gpio.c
-ramstage-y += nhlt.c
+ramstage-y += board.c

src/mainboard/google/fizz/variants/endeavour/board.c

@@ -12,3 +12,8 @@ void variant_nhlt_oem_overrides(const char **oem_id,
 	*oem_table_id = "ENDEAVOUR";
 	*oem_revision = 0;
 }
+
+void variant_chip_display_init(void)
+{
+
+}