qemu/qemu_sbsa: fix memory type of secure NOR flash

This commit fixes the wrong memory type, secure NOR flash
shall be mapped as MT_DEVICE.
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Change-Id: I9c9ed51675d84ded675bb56b2e4ec7a08184c602

plat/qemu/qemu_sbsa/include/platform_def.h

@@ -353,7 +353,7 @@
 #define MAP_SECURE_VARSTORE		MAP_REGION_FLAT( \
 					QEMU_SECURE_VARSTORE_BASE, \
 					QEMU_SECURE_VARSTORE_SIZE, \
-					MT_MEMORY | MT_RW | \
+					MT_DEVICE | MT_RW | \
 					MT_SECURE | MT_USER)
 #endif