video: add CONFIG_I2C_EDID and disable CONFIG_DISPLAY by default

Enabling CONFIG_DISPLAY breaks building for some architectures
(microblaze-generic), so we disable CONFIG_DISPLAY in Kconfig
by default and enable this option in defconfigs. CONFIG_DISPLAY
depends on CONFIG_I2C_EDID, so add and enable it in defconfigs, too.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reported-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/configs/rock2_defconfig b/configs/rock2_defconfig
index 2563775..68e3b36 100644
--- a/configs/rock2_defconfig
+++ b/configs/rock2_defconfig
@@ -45,6 +45,8 @@
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_SYS_NS16550=y
 CONFIG_DM_VIDEO=y
+CONFIG_I2C_EDID=y
+CONFIG_DISPLAY=y
 CONFIG_VIDEO_ROTATION=y
 CONFIG_VIDEO_ROCKCHIP=y
 CONFIG_USE_PRIVATE_LIBGCC=y