[magma] Disable EXT_calibrated_timestamps temporarily on Linux

Bug:87391

Change-Id: I657e64521cca06a4b3a4167f778834c967b02fca
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/638105
Reviewed-by: David Reveman <reveman@google.com>
diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c
index ecae109..d3a4ae4 100644
--- a/src/intel/vulkan/anv_device.c
+++ b/src/intel/vulkan/anv_device.c
@@ -272,7 +272,12 @@
       .KHR_zero_initialize_workgroup_memory  = true,
       .EXT_4444_formats                      = true,
       .EXT_buffer_device_address             = device->has_a64_buffer_access,
+      // TODO(fxbug.dev/87391) - remove
+#if defined(__linux__) && defined(USE_MAGMA)
+      .EXT_calibrated_timestamps             = false,
+#else
       .EXT_calibrated_timestamps             = device->has_reg_timestamp,
+#endif
       .EXT_conditional_rendering             = device->info.ver >= 8 ||
                                                device->info.is_haswell,
       .EXT_conservative_rasterization        = device->info.ver >= 9,