Give a production-sounding name to the p256m option

Now that p256-m is officially a production feature and not just an example,
give it a more suitable name.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/3rdparty/CMakeLists.txt b/3rdparty/CMakeLists.txt
index 67db68d..14a4674 100644
--- a/3rdparty/CMakeLists.txt
+++ b/3rdparty/CMakeLists.txt
@@ -1,5 +1,5 @@
 execute_process(COMMAND ${MBEDTLS_PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/config.py -f ${CMAKE_CURRENT_SOURCE_DIR}/../include/mbedtls/mbedtls_config.h get MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED RESULT_VARIABLE everest_result)
-execute_process(COMMAND ${MBEDTLS_PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/config.py -f ${CMAKE_CURRENT_SOURCE_DIR}/../include/mbedtls/mbedtls_config.h get MBEDTLS_P256M_EXAMPLE_DRIVER_ENABLED RESULT_VARIABLE p256m_result)
+execute_process(COMMAND ${MBEDTLS_PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/../scripts/config.py -f ${CMAKE_CURRENT_SOURCE_DIR}/../include/mbedtls/mbedtls_config.h get MBEDTLS_PSA_P256M_DRIVER_ENABLED RESULT_VARIABLE p256m_result)
 
 if(${everest_result} EQUAL 0)
     add_subdirectory(everest)
diff --git a/3rdparty/p256-m/p256-m/p256-m.c b/3rdparty/p256-m/p256-m/p256-m.c
index 050ffa5..3f878f7 100644
--- a/3rdparty/p256-m/p256-m/p256-m.c
+++ b/3rdparty/p256-m/p256-m/p256-m.c
@@ -13,7 +13,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#if defined (MBEDTLS_P256M_EXAMPLE_DRIVER_ENABLED)
+#if defined (MBEDTLS_PSA_P256M_DRIVER_ENABLED)
 
 /*
  * Zeroize memory - this should not be optimized away
diff --git a/3rdparty/p256-m/p256-m_driver_entrypoints.c b/3rdparty/p256-m/p256-m_driver_entrypoints.c
index b2236e4..7709301 100644
--- a/3rdparty/p256-m/p256-m_driver_entrypoints.c
+++ b/3rdparty/p256-m/p256-m_driver_entrypoints.c
@@ -26,7 +26,7 @@
 #include <stddef.h>
 #include <string.h>
 
-#if defined(MBEDTLS_P256M_EXAMPLE_DRIVER_ENABLED)
+#if defined(MBEDTLS_PSA_P256M_DRIVER_ENABLED)
 
 /* INFORMATION ON PSA KEY EXPORT FORMATS:
  *
@@ -321,4 +321,4 @@
     return status;
 }
 
-#endif /* MBEDTLS_P256M_EXAMPLE_DRIVER_ENABLED */
+#endif /* MBEDTLS_PSA_P256M_DRIVER_ENABLED */
diff --git a/3rdparty/p256-m/p256-m_driver_entrypoints.h b/3rdparty/p256-m/p256-m_driver_entrypoints.h
index a509ba9..d92a8f0 100644
--- a/3rdparty/p256-m/p256-m_driver_entrypoints.h
+++ b/3rdparty/p256-m/p256-m_driver_entrypoints.h
@@ -21,11 +21,11 @@
 #ifndef P256M_DRIVER_ENTRYPOINTS_H
 #define P256M_DRIVER_ENTRYPOINTS_H
 
-#if defined(MBEDTLS_P256M_EXAMPLE_DRIVER_ENABLED)
+#if defined(MBEDTLS_PSA_P256M_DRIVER_ENABLED)
 #ifndef PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT
 #define PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT
 #endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
-#endif /* MBEDTLS_P256M_EXAMPLE_DRIVER_ENABLED */
+#endif /* MBEDTLS_PSA_P256M_DRIVER_ENABLED */
 
 #include "psa/crypto_types.h"