cbfs: Remove x86 .data section limitation comment

With commit b7832de026 ("x86: Add .data
section support for pre-memory stages"), this comment is not correct
anymore and should be removed.

Change-Id: I61597841cd3f90cebe7323a68738f91d6d64b33d
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77988
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: sridhar siricilla <siricillasridhar@gmail.com>
Reviewed-by: Maximilian Brune <maximilian.brune@9elements.com>

src/lib/cbfs.c

@@ -443,8 +443,7 @@ static void *do_alloc(union cbfs_mdata *mdata, struct region_device *rdev,
 		return mapping;
 	} else if (!cbfs_cache.size) {
 		/* In order to use the cbfs_cache you need to add a CBFS_CACHE to your
-		 * memlayout. For stages that don't have .data sections (x86 pre-RAM),
-		 * it is not possible to add a CBFS_CACHE. */
+		 * memlayout. */
 		ERROR("Cannot map compressed file %s without cbfs_cache\n", mdata->h.filename);
 		return NULL;
 	} else {