Adding framebuffer console rotation to kernels.

This helps in some weird screens that otherwise show the console 90° turned.

pkgs/os-specific/linux/kernel/common-config.nix

@@ -140,6 +140,7 @@ with stdenv.lib;
   FB_3DFX_ACCEL y
   FB_VESA y
   FRAMEBUFFER_CONSOLE y
+  FRAMEBUFFER_CONSOLE_ROTATION y
   ${optionalString (versionOlder version "3.9" || stdenv.system == "i686-linux") ''
     FB_GEODE y
   ''}