Merge version 2.4.90-1+rpi1 and 2.4.91-2 to produce 2.4.91-2+rpi1

diff --cc debian/changelog
index a7d5cf5547c4b5cb640b067507883c3b136fc7bd,1cd5de873652e911c29e379440b0e3b0d26a875f..e92480825dddbc1648f767eb5de5cbcf59cee19b
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,9 -1,14 +1,21 @@@
- libdrm (2.4.90-1+rpi1) buster-staging; urgency=medium
++libdrm (2.4.91-2+rpi1) buster-staging; urgency=medium
 +
 +  [changes brought forward from 2.4.74-1+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Wed, 28 Jun 2017 21:14:42 +0000]
 +  * Move valgrind to build-conflicts, the old version in raspbian breaks the build.
 +
-  -- Raspbian forward porter <root@raspbian.org>  Thu, 01 Mar 2018 06:02:42 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Thu, 22 Mar 2018 23:19:22 +0000
++
+ libdrm (2.4.91-2) unstable; urgency=medium
+ 
+   * Update libdrm-freedreno1.symbols and shlibs (Closes: #892960).
+ 
+  -- Sven Joachim <svenjoac@gmx.de>  Wed, 14 Mar 2018 22:23:03 +0100
+ 
+ libdrm (2.4.91-1) unstable; urgency=medium
+ 
+   * New upstream release.
+ 
+  -- Timo Aaltonen <tjaalton@debian.org>  Wed, 14 Mar 2018 09:02:58 +0200
  
  libdrm (2.4.90-1) unstable; urgency=medium