turnip: fix invalid VK_ERROR_OUT_OF_POOL_MEMORY

When VK_DESCRIPTOR_TYPE_SAMPLER is provided, it doesn't need to be
counted as a buffer count. Otherwise it leads to mismatch of allocated
buffer size, hitting VK_ERROR_OUT_OF_POOL_MEMORY finally.

Fixes: c39afe68f0

Also fixes amber tests:
./tests/cases/address_modes_float.amber
./tests/cases/address_modes_int.amber
./tests/cases/magfilter_linear.amber
./tests/cases/magfilter_nearest.amber

Reviewed-by: Jonathan Marek <jonathan@marek.ca>

src/freedreno/vulkan/tu_descriptor_set.c

@@ -172,6 +172,9 @@ tu_CreateDescriptorSetLayout(
       unsigned binding_buffer_count = 1;
 
       switch (binding->descriptorType) {
+      case VK_DESCRIPTOR_TYPE_SAMPLER:
+         binding_buffer_count = 0;
+         break;
       case VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC:
       case VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC:
          assert(!(pCreateInfo->flags & VK_DESCRIPTOR_SET_LAYOUT_CREATE_PUSH_DESCRIPTOR_BIT_KHR));