google/gru: Incorporate feedback to #14279

To avoid diverging too much on an actively developed code base, keep
the changes to a separate commit that can be downstreamed more easily:

- removed unused includes
- gave kevin board a "Kevin" part number
- marked RW_LEGACY as CBFS region (to follow up upstream changes)
- moved romstage entry point to SoC code (instead of encouraging
  per-board copy pasta)

Change-Id: Ief0c8db3c4af96fe2be2e2397d8874ad06fb6f1f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/14362
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/gru/Kconfig

@@ -41,6 +41,7 @@ config MAINBOARD_DIR
 
 config MAINBOARD_PART_NUMBER
 	string
+	default "Kevin" if BOARD_GOOGLE_KEVIN
 	default "Gru"
 
 config MAINBOARD_VENDOR

src/mainboard/google/gru/Makefile.inc

@@ -29,7 +29,6 @@ romstage-y += boardid.c
 romstage-y += chromeos.c
 romstage-y += memlayout.ld
 romstage-y += reset.c
-romstage-y += romstage.c
 
 ramstage-y += boardid.c
 ramstage-y += chromeos.c

src/mainboard/google/gru/chromeos.c

@@ -15,10 +15,6 @@
  */
 
 #include <boot/coreboot_tables.h>
-#include <console/console.h>
-#include <ec/google/chromeec/ec.h>
-#include <ec/google/chromeec/ec_commands.h>
-#include <string.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 
 void fill_lb_gpios(struct lb_gpios *gpios)

src/mainboard/google/gru/chromeos.fmd

@@ -25,5 +25,5 @@ FLASH@0x0 0x800000 {
 		SHARED_DATA@0x0 0x10000
 	}
 	RW_NVRAM@0x5f0000 0x10000
-	RW_LEGACY@0x600000 0x200000
+	RW_LEGACY(CBFS)@0x600000 0x200000
 }

src/mainboard/google/gru/mainboard.c

@@ -14,12 +14,7 @@
  *
  */
 
-#include <arch/cache.h>
-#include <arch/io.h>
-#include <boardid.h>
-#include <boot/coreboot_tables.h>
 #include <device/device.h>
-#include <console/console.h>
 
 static void mainboard_init(device_t dev)
 {

src/soc/rockchip/rk3399/Makefile.inc

@@ -38,6 +38,7 @@ romstage-y += ../common/spi.c
 romstage-$(CONFIG_DRIVERS_UART) += ../common/uart.c
 romstage-y += clock.c
 romstage-y += timer.c
+romstage-y += romstage.c
 
 ################################################################################