zink: call tc_driver_internal_flush_notify() on flush

I think this is right?

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <!10882>
37 jobs for !10882 with zink-tc_busyness in 9 minutes and 24 seconds (queued for 1 second)
latest detached
Status Name Job ID Coverage
  Sanity
passed sanity #10100618

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  Container
passed arm_build #10100621
aarch64

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passed windows_build_vs2019 #10100622
windows shell 1809 mesa

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passed x86_build-base #10100619

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passed x86_test-base #10100620

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  Container 2
passed android_build #10100627

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passed i386_build #10100624

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passed kernel+rootfs_amd64 #10100630

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passed kernel+rootfs_arm64 #10100631
aarch64

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passed kernel+rootfs_armhf #10100632
aarch64

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passed ppc64el_build #10100625

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passed s390x_build #10100626

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passed x86_build #10100623

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passed x86_test-gl #10100628

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passed x86_test-vk #10100629

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  Meson X86 64
passed meson-clang #10100638

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passed meson-clover #10100639

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passed meson-clover-testing #10100635

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passed meson-gallium #10100636

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passed meson-release #10100637

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passed meson-testing #10100633

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passed meson-testing-asan #10100634

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passed meson-vulkan #10100640

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  Build Misc
passed arm_test #10100641

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passed meson-android #10100642

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passed meson-arm64 #10100644
aarch64

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passed meson-arm64-asan #10100645
aarch64

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passed meson-arm64-build-test #10100646
aarch64

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passed meson-armhf #10100643
aarch64

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passed meson-i386 #10100647

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passed meson-mingw32-x86_64 #10100650

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passed meson-ppc64el #10100649

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passed meson-s390x #10100648
kvm

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  Layered Backends
passed zink-lvp-gl #10100654

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passed zink-lvp-gles2 #10100652

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passed zink-lvp-gles3 #10100653

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passed zink-piglit-quick_gl #10100651

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