imx: Fix build error

Fix wrong environment.h and remove DECLARE_GLOBAL_DATA_PTR

Fixes: 30e39ac7c9 (imx: imx7 Support for Manufacturing Protection)
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Gaurav Jain <gaurav.jain@nxp.com>

arch/arm/mach-imx/cmd_mfgprot.c

@@ -12,13 +12,11 @@
 #include <linux/compiler.h>
 #include <command.h>
 #include <common.h>
-#include <environment.h>
+#include <env.h>
 #include <fsl_sec.h>
 #include <mapmem.h>
 #include <memalign.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 /**
  * do_mfgprot() - Handle the "mfgprot" command-line command
  * @cmdtp:  Command data struct pointer