drm/i915/reg_defs: Add REG_FIELD_MAX wrapper for FIELD_MAX()

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Introduce REG_FIELD_MAX macro as local wrapper around FIELD_MAX() to return
the maximum value representable by a bit mask. The value is cast to u32
for consistency with other REG_* macros and assumes the bitfield fits
within 32 bits.

v2: Use __mask as macro argument aligning with other macros. (Ville)

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://lore.kernel.org/r/20250924141542.3122126-8-ankit.k.nautiyal@intel.com

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Ankit Nautiyal 2025-09-24 19:45:39 +05:30

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commit 94da8e5eee

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drivers/gpu/drm/i915/i915_reg_defs.h

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