configs: khadas viml3 : enable CONFIG_XBC

This is used for bootconfig support with
android boot image header v4

Signed-off-by: Safae Ouajih <souajih@baylibre.com>

configs/khadas-vim3l_android_ab_defconfig

@@ -6,6 +6,7 @@ CONFIG_SYS_TEXT_BASE=0x01000000
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x10000
 CONFIG_DM_GPIO=y
+CONFIG_XBC=y
 CONFIG_DEFAULT_DEVICE_TREE="meson-sm1-khadas-vim3l"
 CONFIG_MESON_G12A=y
 CONFIG_DEBUG_UART_BASE=0xff803000