meson: turn on pl111 not vc4 when pl111 driver specificed

Reviewed-by: Eric Anholt <eric@anholt.net>
fixes: 1918c9b1627d5403 ("meson: Add support for the pl111 driver.")
Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
diff --git a/meson.build b/meson.build
index 5c42102..3312160 100644
--- a/meson.build
+++ b/meson.build
@@ -100,7 +100,7 @@
 _drivers = get_option('gallium-drivers')
 if _drivers != ''
   _split = _drivers.split(',')
-  with_gallium_vc4 = _split.contains('pl111')
+  with_gallium_pl111 = _split.contains('pl111')
   with_gallium_radeonsi = _split.contains('radeonsi')
   with_gallium_nouveau = _split.contains('nouveau')
   with_gallium_softpipe = _split.contains('swrast')