drm/i915: Fix gen9 forcewake range table

Commit 0dd356bb6f ("drm/i915: Eliminate Gen9 special case")
accidentaly dropped a MMIO range between 0xc000 to 0xcfff out
of the blitter forcewake domain. Fix it.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Fixes: 0dd356bb6f ("drm/i915: Eliminate Gen9 special case")
Reported-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1479373363-16528-1-git-send-email-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/intel_uncore.c

@@ -789,7 +789,7 @@ static const struct intel_forcewake_range __gen9_fw_ranges[] = {
 	GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
 	GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
 	GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
-	GEN_FW_RANGE(0xb480, 0xbfff, FORCEWAKE_BLITTER),
+	GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_BLITTER),
 	GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
 	GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_BLITTER),
 	GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),