clk: samsung: exynos7885: Add TREX clocks

TREX D Core and P core clocks seem to be related to the BTS (Bus Traffic
Shaper) inside the Exynos7885 SoC, and are needed for the SoC to
function correctly.

When clocks are cut from TREX D Core, the eMMC and the framebuffer stops
working properly. Other unknown things may stop working as well.

When clocks are cut from TREX P Core, the system locks up needing a hard
reset.

Add these clocks and mark them critical so that they are always on.

Signed-off-by: David Virag <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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