configs: pumpkin: enable fastboot

Enable fastboot commands for mt8516 pumpkin board.
Signed-off-by: NFabien Parent <fparent@baylibre.com>

configs/pumpkin_defconfig

@@ -46,8 +46,13 @@ CONFIG_CMD_PART=y
 # CONFIG_CMD_SLEEP is not set
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
-# CONFIG_NET is not set
 CONFIG_CLK=y
+CONFIG_USB_FUNCTION_FASTBOOT=y
+CONFIG_FASTBOOT_BUF_ADDR=0x4d000000
+CONFIG_FASTBOOT_BUF_SIZE=0x4000000
+CONFIG_FASTBOOT_FLASH=y
+CONFIG_FASTBOOT_FLASH_MMC_DEV=0
+CONFIG_FASTBOOT_MMC_BOOT1_SUPPORT=y
 # CONFIG_INPUT is not set
 CONFIG_DM_MMC=y
 # CONFIG_MMC_QUIRKS is not set