package/xserver_xorg-server: add blind options to specify driver ABI

The upcoming NVidia Tegra2/3 binary blobs only work with a certain
VIDEODRV ABI (namely up to 14), so we must have a way to represent that
ABI so that such packages can not be enabled with a too recent/old ABI.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xserver_xorg-server/Config.in

@@ -56,11 +56,19 @@ config BR2_PACKAGE_XSERVER_XORG_SERVER
 
 if BR2_PACKAGE_XSERVER_XORG_SERVER
 
+config BR2_PACKAGE_XSERVER_XORG_SERVER_VIDEODRV_ABI_19
+	bool
+
+config BR2_PACKAGE_XSERVER_XORG_SERVER_VIDEODRV_ABI
+	int
+	default 19 if BR2_PACKAGE_XSERVER_XORG_SERVER_VIDEODRV_ABI_19
+
 choice
 	bool "X Window System server version"
 
 config BR2_PACKAGE_XSERVER_XORG_SERVER_V_1_17
 	bool "1.17.1"
+	select BR2_PACKAGE_XSERVER_XORG_SERVER_VIDEODRV_ABI_19
 
 endchoice