plat: imx8m: Add the aipstz init to config peripheral access

AIPSTZ provide access control for all the peripherals connected
to it. In this patch all the perperals are configured accessible
to all the master. it can be customized based the actual use
case.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: I5ef5baa1da6906f13a60923d27ede336c61e319a
diff --git a/plat/imx/imx8m/imx_aipstz.c b/plat/imx/imx8m/imx_aipstz.c
new file mode 100644
index 0000000..a36e296
--- /dev/null
+++ b/plat/imx/imx8m/imx_aipstz.c
@@ -0,0 +1,24 @@
+/*
+ * copyright (c) 2019, arm limited and contributors. all rights reserved.
+ *
+ * spdx-license-identifier: bsd-3-clause
+ */
+
+#include <lib/mmio.h>
+
+#include <imx_aipstz.h>
+
+void imx_aipstz_init(const struct aipstz_cfg *aipstz_cfg)
+{
+	const struct aipstz_cfg *aipstz = aipstz_cfg;
+
+	while (aipstz->base != 0U) {
+		mmio_write_32(aipstz->base + AIPSTZ_MPR0, aipstz->mpr0);
+		mmio_write_32(aipstz->base + AIPSTZ_MPR1, aipstz->mpr1);
+
+		for (int i = 0; i < AIPSTZ_OPACR_NUM; i++)
+			mmio_write_32(aipstz->base + OPACR_OFFSET(i), aipstz->opacr[i]);
+
+		aipstz++;
+	}
+}