imx8: ahab: fix 'end address' parameter of rm_find_memreg

parameter 'end address' must be inclusive of address range.

Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/imx8/ahab.c b/arch/arm/mach-imx/imx8/ahab.c
index 361c578..89544b3 100644
--- a/arch/arm/mach-imx/imx8/ahab.c
+++ b/arch/arm/mach-imx/imx8/ahab.c
@@ -97,7 +97,7 @@
 		       img->size);
 
 		s = img->dst & ~(CONFIG_SYS_CACHELINE_SIZE - 1);
-		e = ALIGN(img->dst + img->size, CONFIG_SYS_CACHELINE_SIZE);
+		e = ALIGN(img->dst + img->size, CONFIG_SYS_CACHELINE_SIZE) - 1;
 
 		flush_dcache_range(s, e);