ucm-imx95: various changes

- Move openssl to nativeBuildInputs in ATF build for proper cross-compilation
- Add explicit SILICON validation with clear error messages in firmware build
- Fix fragile wildcard patterns in firmware DDR file copying
- Replace mutable branch URLs with pinned commit hashes for patch stability
- Add U-Boot config merge step (make olddefconfig) after extra config
- Fix cross-compilation toolchain coherence (cpp in optee-os)
- Standardize license format (single value instead of single-element list)
- Update maintainer references with inline name/email format
- Fix typos and grammar in documentation and comments

compulab/ucm-imx95/bsp/ucm-imx95-boot.nix

@@ -24,7 +24,7 @@ in
   imx95-boot = pkgs.stdenv.mkDerivation rec {
     inherit src;
     name = "imx95-mkimage";
-    version = "lf-6.6.36";
+    version = "lf-6.6.52-2.2.1";
 
     postPatch = ''
       substituteInPlace Makefile \
@@ -47,7 +47,6 @@ in
     ];
 
     buildInputs = [
-      git
       glibc.static
       zlib
       zlib.static