Renamed mpi_core_get_mont_R2_unsafe_neg -> mpi_core_get_mont_r2_unsafe_neg

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/library/bignum_core.c b/library/bignum_core.c
index 675eb30..963af5b 100644
--- a/library/bignum_core.c
+++ b/library/bignum_core.c
@@ -511,7 +511,7 @@
     mbedtls_ct_mpi_uint_cond_assign( AN_limbs, X, T, (unsigned char) ( carry ^ borrow ) );
 }
 
-int mbedtls_mpi_core_get_mont_R2_unsafe( mbedtls_mpi *X,
+int mbedtls_mpi_core_get_mont_r2_unsafe( mbedtls_mpi *X,
                                          const mbedtls_mpi *N )
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;