drm/i915: Remove the "INDEX" suffix from PPAT marcos

Remove the "INDEX" suffix from PPAT marcos as they are bits actually, not
indexes.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1505392783-4084-2-git-send-email-zhi.a.wang@intel.com
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index c7ee7d8..729ebaf 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -230,13 +230,13 @@ static gen8_pte_t gen8_pte_encode(dma_addr_t addr,
 
 	switch (level) {
 	case I915_CACHE_NONE:
-		pte |= PPAT_UNCACHED_INDEX;
+		pte |= PPAT_UNCACHED;
 		break;
 	case I915_CACHE_WT:
-		pte |= PPAT_DISPLAY_ELLC_INDEX;
+		pte |= PPAT_DISPLAY_ELLC;
 		break;
 	default:
-		pte |= PPAT_CACHED_INDEX;
+		pte |= PPAT_CACHED;
 		break;
 	}
 
@@ -249,9 +249,9 @@ static gen8_pde_t gen8_pde_encode(const dma_addr_t addr,
 	gen8_pde_t pde = _PAGE_PRESENT | _PAGE_RW;
 	pde |= addr;
 	if (level != I915_CACHE_NONE)
-		pde |= PPAT_CACHED_PDE_INDEX;
+		pde |= PPAT_CACHED_PDE;
 	else
-		pde |= PPAT_UNCACHED_INDEX;
+		pde |= PPAT_UNCACHED;
 	return pde;
 }