drm/i915/display: Eliminate IS_METEORLAKE checks

Most of the IS_METEORLAKE checks in the display code shouldn't actually
be tied to MTL as a platform, but rather to the Xe_LPD+ display IP
(which is used in MTL, but may show up again in future platforms).  In
cases where we're trying to match that specific IP, use a version check
against IP_VER(14, 0).  For cases where we're just handling new behavior
introduced by this IP (but which may also be inherited by future IP as
well), use a ver >= 14 check.

The one exception here is the stolen memory workaround Wa_13010847436
(which is mislabelled as "Wa_22018444074" in the code).  That's truly a
MTL-specific issue rather than being tied to any of the IP blocks, so
leaving the condition as IS_METEORLAKE is correct there.

v2:
 - cdclk check should be >=, not >.  (Gustavo)

Signed-off-by: Matt Roper <[email protected]>
Reviewed-by: Gustavo Sousa <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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