core: plat: imx: implement pl310_nsbase()

Map PL310 registers as non-secure.
Implement pl310_nsbase() that returns non-secure PL310 base address.

Signed-off-by: Clement Faure <clement.faure@nxp.com>

core/arch/arm/plat-imx/imx_pl310.c

@@ -23,6 +23,7 @@
 #define PL310_PREFETCH_DOUBLE_LINEFILL		BIT(30)
 
 register_phys_mem_pgdir(MEM_AREA_IO_SEC, PL310_BASE, CORE_MMU_PGDIR_SIZE);
+register_phys_mem_pgdir(MEM_AREA_IO_NSEC, PL310_BASE, CORE_MMU_PGDIR_SIZE);
 
 void arm_cl2_config(vaddr_t pl310_base)
 {
@@ -83,6 +84,11 @@ vaddr_t pl310_base(void)
 	return core_mmu_get_va(PL310_BASE, MEM_AREA_IO_SEC, 1);
 }
 
+vaddr_t pl310_nsbase(void)
+{
+	return core_mmu_get_va(PL310_BASE, MEM_AREA_IO_NSEC, 1);
+}
+
 #ifdef CFG_PL310_SIP_PROTOCOL
 uint32_t pl310_enable(void)
 {