panfrost: Drop redundant NULL check

ctx->blend is already dereferenced by this point anyway.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6440>
diff --git a/src/gallium/drivers/panfrost/pan_cmdstream.c b/src/gallium/drivers/panfrost/pan_cmdstream.c
index c214dd6..4a11bc9 100644
--- a/src/gallium/drivers/panfrost/pan_cmdstream.c
+++ b/src/gallium/drivers/panfrost/pan_cmdstream.c
@@ -686,7 +686,7 @@
                 zsa->base.depth.enabled ? zsa->base.depth.func : PIPE_FUNC_ALWAYS));
 
         SET_BIT(fragmeta->unknown2_4, MALI_NO_DITHER,
-                (dev->quirks & MIDGARD_SFBD) && ctx->blend &&
+                (dev->quirks & MIDGARD_SFBD) &&
                 !ctx->blend->base.dither);
 
         SET_BIT(fragmeta->unknown2_4, 0x10, dev->quirks & MIDGARD_SFBD);