drm/i915/rkl: s/RKL/ROCKETLAKE for platform/subplatform defines

Follow consistent naming convention. Replace RKL with
ROCKETLAKE.Replace IS_RKL_GRAPHICS_STEP with
IS_ROCKETLAKE && IS_DISPLAY_STEP.

v2:
- s/RKL/rkl in the subject prefix(Anusha)

v3:
- Unrolled wrapper IS_RKL_DISPLAY_STEP.
- Replace IS_PLATFORM && IS_DISPLAY_STEP (Jani/Tvrtko)

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane@intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230801135344.3797924-8-dnyaneshwar.bhadane@intel.com

drivers/gpu/drm/i915/display/intel_display_power.c

@@ -1609,7 +1609,7 @@ static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv)
 		return;
 
 	if (IS_ALDERLAKE_S(dev_priv) ||
-	    IS_RKL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
+	    (IS_ROCKETLAKE(dev_priv) && IS_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0)))
 		/* Wa_1409767108 */
 		table = wa_1409767108_buddy_page_masks;
 	else

drivers/gpu/drm/i915/i915_drv.h

@@ -659,8 +659,6 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 	(IS_TIGERLAKE(__i915) && \
 	 IS_DISPLAY_STEP(__i915, since, until))
 
-#define IS_RKL_DISPLAY_STEP(p, since, until) \
-	(IS_ROCKETLAKE(p) && IS_DISPLAY_STEP(p, since, until))
 
 #define IS_ADLS_DISPLAY_STEP(__i915, since, until) \
 	(IS_ALDERLAKE_S(__i915) && \