build(externals): move to MbedTLS upstream 2.28.1

The latest LTS release now includes the changes of the yuzu-emu fork,
so we can now directly use the upstream version instead.

.gitmodules

@@ -30,7 +30,7 @@
     url = https://github.com/yuzu-emu/sirit
 [submodule "mbedtls"]
     path = externals/mbedtls
-    url = https://github.com/yuzu-emu/mbedtls
+    url = https://github.com/Mbed-TLS/mbedtls
 [submodule "xbyak"]
     path = externals/xbyak
     url = https://github.com/herumi/xbyak.git

externals/CMakeLists.txt

@@ -34,6 +34,15 @@ endif()
 find_package(MbedTLS 2.16)
 if(NOT MbedTLS_FOUND)
     message(STATUS "MbedTLS not found, falling back to externals")
+
+    set(ENABLE_PROGRAMS OFF CACHE BOOL "")
+    set(ENABLE_TESTING OFF CACHE BOOL "")
+
+    # Edit MbedTLS config header to enable CMAC
+    file(READ "./mbedtls/include/mbedtls/config.h" MbedTLS_CONFIG_FILE)
+    string(REPLACE "//#define MBEDTLS_CMAC_C" "#define MBEDTLS_CMAC_C" MbedTLS_CONFIG_FILE_CMAC "${MbedTLS_CONFIG_FILE}")
+    file(WRITE "./mbedtls/include/mbedtls/config.h" "${MbedTLS_CONFIG_FILE_CMAC}")
+
     add_subdirectory(mbedtls EXCLUDE_FROM_ALL)
     target_include_directories(mbedcrypto PUBLIC ./mbedtls/include)
     add_library(MbedTLS::mbedcrypto ALIAS mbedcrypto)