fix xscale icache and dcache commands

Simple patch that fixes the broken xscale icache and dcache commands.
This broke when the helper functions and macros were changed.

[ dbrownell@users.sourceforge.net: don't use strcasecmp ]

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

src/target/xscale.c

@@ -3197,9 +3197,9 @@ COMMAND_HANDLER(xscale_handle_idcache_command)
 		return ERROR_OK;
 	}
 
-	bool icache;
-	COMMAND_PARSE_BOOL(CMD_NAME, icache, "icache", "dcache");
-
+	bool icache = false;
+	if (strcmp(CMD_NAME, "icache") == 0)
+		icache = true;
 	if (CMD_ARGC >= 1)
 	{
 		bool enable;