drm/amd/display: temporary fix for page faulting

This reverts a part of the
commit 826e7ffa
 ("drm/amd/display: [FW Promotion] Release 0.0.153.0")
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Ayush Gupta<ayugupta@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h

@@ -947,7 +947,7 @@ struct dmub_cmd_PLAT_54186_wa {
 		uint8_t grph_stereo : 1; /**< 1 if stereo */
 		uint32_t reserved : 21; /**< Reserved */
 	} flip_params; /**< Pageflip parameters */
-	uint32_t reserved[8]; /**< Reserved bits */
+	uint32_t reserved[9]; /**< Reserved bits */
 };
 
 /**