base: Tag API methods in crc.hh

Change-Id: I4fc8977dad705a6774f649479184cdfb15aa2be5
Signed-off-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32961
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>

src/base/crc.hh

@@ -51,6 +51,8 @@
  * @param size: Number of bytes
  *
  * @return 32-bit remainder of the checksum
+ *
+ * @ingroup api_base_utils
  */
 template <uint32_t Poly>
 uint32_t