broadcom/compiler: update compact arrays comment

PIPE_CAP_NIR_COMPACT_ARRAYS is gone since commit
2e5d49b3dd

v3d properly uses the compact_arrays option from
nir_shader_compiler_options since commit
d694c1b094

Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36446>

src/broadcom/compiler/vir.c

@@ -1138,7 +1138,7 @@ v3d_nir_lower_fs_late(struct v3d_compile *c)
          *
          * The SPIR-V compiler will declare VARING_SLOT_CLIP_DIST0 as compact
          * array variable, so we have GL's clip lowering follow suit
-         * (PIPE_CAP_NIR_COMPACT_ARRAYS).
+         * (compact_arrays option at nir_shader_compiler_options)
          */
         if (c->fs_key->ucp_enables)
                 NIR_PASS(_, c->s, nir_lower_clip_fs, c->fs_key->ucp_enables, true, false);