[meta-fsl-arm][PATCH] gpu-viv-bin-mx6q: Make backend configurable

[Carlos Rafael Giani <dv@pseudoterminal.org>]

With this change, the user can set USE_X11 etc. in local.conf to
override the recipe's DISTRO_FEATURES based choice. This is for example
beneficial when both X11 and wayland are supported, or when the user
wants to make use of the regular framebuffer backend. (Modifying
the distro features list may have far reaching consequences.)

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
---
 recipes-graphics/gpu-viv-bin-mx6q/gpu-viv-bin-mx6q.inc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/recipes-graphics/gpu-viv-bin-mx6q/gpu-viv-bin-mx6q.inc b/recipes-graphics/gpu-viv-bin-mx6q/gpu-viv-bin-mx6q.inc
index 2b94153..4e37db0 100644
--- a/recipes-graphics/gpu-viv-bin-mx6q/gpu-viv-bin-mx6q.inc
+++ b/recipes-graphics/gpu-viv-bin-mx6q/gpu-viv-bin-mx6q.inc
@@ -60,9 +60,9 @@ python __anonymous () {
                 raise bb.parse.SkipPackage("Package Float-Point is not compatible with the machine")
 }
 
-USE_X11 = "${@base_contains("DISTRO_FEATURES", "x11", "yes", "no", d)}"
-USE_DFB = "${@base_contains("DISTRO_FEATURES", "directfb", "yes", "no", d)}"
-USE_WL = "${@base_contains("DISTRO_FEATURES", "wayland", "yes", "no", d)}"
+USE_X11 ?= "${@base_contains("DISTRO_FEATURES", "x11", "yes", "no", d)}"
+USE_DFB ?= "${@base_contains("DISTRO_FEATURES", "directfb", "yes", "no", d)}"
+USE_WL ?= "${@base_contains("DISTRO_FEATURES", "wayland", "yes", "no", d)}"
 
 # Inhibit warnings about files being stripped.
 INHIBIT_PACKAGE_DEBUG_SPLIT = "1"
-- 
1.8.5.3