configs: am335x_guardian: set boot delay

- set boot delay to zero, to increase boot speed
Signed-off-by: NGireesh Hiremath <Gireesh.Hiremath@in.bosch.com>
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20210611161350.2141-10-Gireesh.Hiremath@in.bosch.com

configs/am335x_guardian_defconfig

@@ -19,6 +19,7 @@ CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_ENV_OFFSET_REDUND=0x540000
 CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_DISTRO_DEFAULTS=y
+CONFIG_BOOTDELAY=0
 CONFIG_AUTOBOOT_KEYED=y
 CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n"
 CONFIG_AUTOBOOT_DELAY_STR="d"