anv/tests: Zero-initialize instances

Some of the tests were actually relying on some of those uninitialized
bits to be non-zero.  In particular, a couple want use_softpin = true.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
(cherry picked from commit 9076e9f375)

src/intel/vulkan/tests/block_pool_grow_first.c

@@ -27,7 +27,11 @@
 
 int main(int argc, char **argv)
 {
-   struct anv_instance instance;
+   struct anv_instance instance = {
+      .physicalDevice = {
+         .use_softpin = true,
+      },
+   };
    struct anv_device device = {
       .instance = &instance,
    };

src/intel/vulkan/tests/block_pool_no_free.c

@@ -111,7 +111,7 @@ static void validate_monotonic(int32_t **blocks)
 
 static void run_test()
 {
-   struct anv_instance instance;
+   struct anv_instance instance = { };
    struct anv_device device = {
       .instance = &instance,
    };

src/intel/vulkan/tests/state_pool.c

@@ -36,7 +36,7 @@
 
 int main(int argc, char **argv)
 {
-   struct anv_instance instance;
+   struct anv_instance instance = { };
    struct anv_device device = {
       .instance = &instance,
    };

src/intel/vulkan/tests/state_pool_free_list_only.c

@@ -35,7 +35,7 @@
 
 int main(int argc, char **argv)
 {
-   struct anv_instance instance;
+   struct anv_instance instance = { };
    struct anv_device device = {
       .instance = &instance,
    };

src/intel/vulkan/tests/state_pool_no_free.c

@@ -56,7 +56,7 @@ static void *alloc_states(void *_job)
 
 static void run_test()
 {
-   struct anv_instance instance;
+   struct anv_instance instance = { };
    struct anv_device device = {
       .instance = &instance,
    };

src/intel/vulkan/tests/state_pool_padding.c

@@ -27,7 +27,11 @@
 
 int main(int argc, char **argv)
 {
-   struct anv_instance instance;
+   struct anv_instance instance = {
+      .physicalDevice = {
+         .use_softpin = true,
+      },
+   };
    struct anv_device device = {
       .instance = &instance,
    };