memory: mtk-smi: Enable sleep ctrl safety function for MT8195

Enable the sleep ctrl function to wait until all the queued commands
are executed before suspending the LARBs, like done for MT8186.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: NMacpaul Lin <macpaul.lin@mediatek.com>
Link: https://lore.kernel.org/r/20220204125543.1189151-1-angelogioacchino.delregno@collabora.comSigned-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

drivers/memory/mtk-smi.c

@@ -366,7 +366,8 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = {
 
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8195 = {
 	.config_port                = mtk_smi_larb_config_port_gen2_general,
-	.flags_general	            = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG,
+	.flags_general	            = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG |
+				      MTK_SMI_FLAG_SLEEP_CTL,
 	.ostd		            = mtk_smi_larb_mt8195_ostd,
 };