padlock: Remove legacy hardware crypto plugin

Unlikely there is even still hardware that would support this.

Also removed the CPU feature detection for these chips.

scripts/test.sh

@@ -263,7 +263,7 @@ all|alpine|codeql|coverage|sonarcloud|no-dbg|no-testable-ke)
 	fi
 	CONFIG="--enable-all --disable-android-log
 			--disable-kernel-pfroute
-			--disable-lock-profiler --disable-padlock --disable-fuzzing
+			--disable-lock-profiler --disable-fuzzing
 			--disable-osx-attr --disable-tkm
 			--disable-unwind-backtraces
 			--disable-svc --disable-dbghelp-backtraces --disable-socket-win