compositor-fbdev: drop dependency on libdrm

Signed-off-by: Adrian Negreanu <adrian.m.negreanu@intel.com>
diff --git a/configure.ac b/configure.ac
index 7c2da44..a43bf5b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -190,7 +190,7 @@
                [test x$enable_fbdev_compositor = xyes])
 AS_IF([test x$enable_fbdev_compositor = xyes], [
   AC_DEFINE([BUILD_FBDEV_COMPOSITOR], [1], [Build the fbdev compositor])
-  PKG_CHECK_MODULES([FBDEV_COMPOSITOR], [libudev >= 136 mtdev >= 1.1.0 libdrm >= 2.4.30])
+  PKG_CHECK_MODULES([FBDEV_COMPOSITOR], [libudev >= 136 mtdev >= 1.1.0])
 ])
 
 AC_ARG_ENABLE([rdp-compositor], [  --enable-rdp-compositor],,