test: regmap: Increase size of syscon0 memory

The upcoming changes to the regmap interface will contain a proper check
for plausibility when reading/writing from/to a register map. To still
have the current tests pass, increase the size of the memory region for
the syscon0 device, since one of the tests reads and writes beyond this
range.

Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index ffc93d0..71d1b39 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -529,7 +529,7 @@
 
 	syscon@0 {
 		compatible = "sandbox,syscon0";
-		reg = <0x10 4>;
+		reg = <0x10 16>;
 	};
 
 	syscon@1 {
diff --git a/test/dm/regmap.c b/test/dm/regmap.c
index d4b86b3..b28d6a6 100644
--- a/test/dm/regmap.c
+++ b/test/dm/regmap.c
@@ -25,7 +25,7 @@
 	ut_assertok_ptr(map);
 	ut_asserteq(1, map->range_count);
 	ut_asserteq(0x10, map->ranges[0].start);
-	ut_asserteq(4, map->ranges[0].size);
+	ut_asserteq(16, map->ranges[0].size);
 	ut_asserteq(0x10, map_to_sysmem(regmap_get_range(map, 0)));
 
 	ut_assertok(uclass_get_device(UCLASS_SYSCON, 1, &dev));