[Buildroot] [PATCH] package/libcamera-apps: enable LIBAV only if libdrm is present

[Marcus Folkesson]

Since commit 35266e84043f880d7591e52b71a8c5b8d0e4717d, libcamera-apps
does enable LIBAV by default which depends on libdrm.

Fixes:
- http://autobuild.buildroot.net/results/548f2a3b353ce4693fb60d7fb1e06e02af22991c/

/home/buildroot/autobuild/run/instance-1/output-1/build/libcamera-apps-1.1.1/encoder/libav_encoder.cpp:13:10: fatal error: libdrm/drm_fourcc.h: No such file or directory
   13 | #include <libdrm/drm_fourcc.h>
      |          ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Marcus Folkesson <marcus.folkesson at gmail.com>
---
 package/libcamera-apps/libcamera-apps.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/package/libcamera-apps/libcamera-apps.mk b/package/libcamera-apps/libcamera-apps.mk
index 290ee9a026..385c65136e 100644
--- a/package/libcamera-apps/libcamera-apps.mk
+++ b/package/libcamera-apps/libcamera-apps.mk
@@ -25,8 +25,10 @@ LIBCAMERA_APPS_CONF_OPTS = \
 ifeq ($(BR2_PACKAGE_LIBDRM),y)
 LIBCAMERA_APPS_DEPENDENCIES += libdrm
 LIBCAMERA_APPS_CONF_OPTS += -DENABLE_DRM=1
+LIBCAMERA_APPS_CONF_OPTS += -DENABLE_LIBAV=1
 else
 LIBCAMERA_APPS_CONF_OPTS += -DENABLE_DRM=0
+LIBCAMERA_APPS_CONF_OPTS += -DENABLE_LIBAV=0
 endif
 
 ifeq ($(BR2_PACKAGE_XORG7),y)
-- 
2.38.1