anv: Properly advertise sampledImageIntegerSampleCounts

We support the same set of samples for integer color formats as for
non-integer.  We've been advertising it wrong since before the initial
Vulkan 1.0 release. :-(

Fixes: d689745303 "vk/0.210.0: Rework device features and limits"
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/vulkan/anv_device.c

       .framebufferNoAttachmentsSampleCounts     = sample_counts,
       .maxColorAttachments                      = MAX_RTS,
       .sampledImageColorSampleCounts            = sample_counts,
-      .sampledImageIntegerSampleCounts          = VK_SAMPLE_COUNT_1_BIT,
+      .sampledImageIntegerSampleCounts          = sample_counts,
       .sampledImageDepthSampleCounts            = sample_counts,
       .sampledImageStencilSampleCounts          = sample_counts,
       .storageImageSampleCounts                 = VK_SAMPLE_COUNT_1_BIT,