Bignum: add missing limb qualifiers

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/library/bignum_core.h b/library/bignum_core.h
index 37f3617..9fd9d20 100644
--- a/library/bignum_core.h
+++ b/library/bignum_core.h
@@ -45,7 +45,7 @@
  * \note This function returns 0 if all the limbs of \p A are 0.
  *
  * \param[in] A     The address of the MPI.
- * \param a_limbs   The number of limbs of \p A.
+ * \param A_limbs   The number of limbs of \p A.
  *
  * \return      The number of bits in \p A.
  */
@@ -55,10 +55,10 @@
  * into the storage form used by mbedtls_mpi.
  *
  * \param[in,out] A     The address of the MPI.
- * \param limbs         The number of limbs of \p A.
+ * \param A_limbs       The number of limbs of \p A.
  */
 void mbedtls_mpi_core_bigendian_to_host( mbedtls_mpi_uint *A,
-                                         size_t limbs );
+                                         size_t A_limbs );
 
 /** Import X from unsigned binary data, little-endian.
  *