drm/i915: Clean-up bonding debug message.

We should stop using the gen name and the "+" to reference
the newer platforms.
And on this case specifically we can simplify the debug
message even further.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015091129.83226-1-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/gem/i915_gem_context.c

@@ -479,7 +479,7 @@ set_proto_ctx_engines_bond(struct i915_user_extension __user *base, void *data)
 	if (GRAPHICS_VER(i915) >= 12 && !IS_TIGERLAKE(i915) &&
 	    !IS_ROCKETLAKE(i915) && !IS_ALDERLAKE_S(i915)) {
 		drm_dbg(&i915->drm,
-			"Bonding on gen12+ aside from TGL, RKL, and ADL_S not supported\n");
+			"Bonding not supported on this platform\n");
 		return -ENODEV;
 	}