Fix typos

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/library/bignum_mod.h b/library/bignum_mod.h
index 62ecf2b..7eac1df 100644
--- a/library/bignum_mod.h
+++ b/library/bignum_mod.h
@@ -56,8 +56,8 @@
     MBEDTLS_MPI_MOD_REP_OPT_RED
 } mbedtls_mpi_mod_rep_selector;
 
-#define MBEDTLS_MI_MOD_EXT_REP_LE   0x1
-#define MBEDTLS_MI_MOD_EXT_REP_BE   0x2
+#define MBEDTLS_MPI_MOD_EXT_REP_LE   0x1
+#define MBEDTLS_MPI_MOD_EXT_REP_BE   0x2
 
 void mbedtls_mpi_mod_residue_release( mbedtls_mpi_mod_residue *r );
 
@@ -67,7 +67,7 @@
 
 void mbedtls_mpi_mod_modulus_init( mbedtls_mpi_mod_modulus *m );
 
-void mbedtls_mpi_mod_modulus_init( mbedtls_mpi_mod_modulus *m );
+void mbedtls_mpi_mod_modulus_free( mbedtls_mpi_mod_modulus *m );
 
 int mbedtls_mpi_mod_modulus_setup( mbedtls_mpi_mod_modulus *m,
                                    mbedtls_mpi_uint *p,
diff --git a/library/bignum_mod_raw.h b/library/bignum_mod_raw.h
index 8a202ba..21743e0 100644
--- a/library/bignum_mod_raw.h
+++ b/library/bignum_mod_raw.h
@@ -17,8 +17,8 @@
  *  limitations under the License.
  */
 
-#ifndef MBEDTLS_BIGNUM_CORE_H
-#define MBEDTLS_BIGNUM_CORE_H
+#ifndef MBEDTLS_BIGNUM_MOD_RAW_H
+#define MBEDTLS_BIGNUM_MOD_RAW_H
 
 #include "common.h"
 
@@ -36,4 +36,4 @@
                                unsigned char *buf,
                                size_t buflen );
 
-#endif /* MBEDTLS_BIGNUM_CORE_H */
+#endif /* MBEDTLS_BIGNUM_MOD_RAW_H */
diff --git a/library/bignum_new.c b/library/bignum_new.c
index 976301d..b6a806e 100644
--- a/library/bignum_new.c
+++ b/library/bignum_new.c
@@ -413,10 +413,10 @@
                               unsigned char *buf,
                               size_t buflen )
 {
-    if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_LE )
+    if( m->ext_rep & MBEDTLS_MPI_MOD_EXT_REP_LE )
         return mbedtls_mpi_core_read_le( X, m->n, buf, buflen );
 
-    else if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_BE )
+    else if( m->ext_rep & MBEDTLS_MPI_MOD_EXT_REP_BE )
         return mbedtls_mpi_core_read_be( X, m->n, buf, buflen );
 
     else
@@ -430,10 +430,10 @@
                                unsigned char *buf,
                                size_t buflen )
 {
-    if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_LE )
+    if( m->ext_rep & MBEDTLS_MPI_MOD_EXT_REP_LE )
         return mbedtls_mpi_core_write_le( X, m->n, buf, buflen );
 
-    else if( m->ext_rep & MBEDTLS_MI_MOD_EXT_REP_BE )
+    else if( m->ext_rep & MBEDTLS_MPI_MOD_EXT_REP_BE )
         return mbedtls_mpi_core_write_be( X, m->n, buf, buflen );
 
     else