bus: ti-sysc: Fix missing force mstandby quirk handling

Commit 03856e928b ("bus: ti-sysc: Handle mstandby quirk and use it for
musb") added quirk handling for mstandby quirk but did not consider that
we also need a quirk variant for SYSC_QUIRK_FORCE_MSTANDBY.

We need to use forced idle mode for both SYSC_QUIRK_SWSUP_MSTANDBY and
SYSC_QUIRK_FORCE_MSTANDBY, but SYSC_QUIRK_SWSUP_MSTANDBY also need to
additionally also configure no-idle mode when enabled.

Fixes: 03856e928b ("bus: ti-sysc: Handle mstandby quirk and use it for musb")
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/bus/ti-sysc.c

@@ -981,7 +981,8 @@ static int sysc_disable_module(struct device *dev)
 		return ret;
 	}
 
-	if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
+	if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_MSTANDBY) ||
+	    ddata->cfg.quirks & (SYSC_QUIRK_FORCE_MSTANDBY))
 		best_mode = SYSC_IDLE_FORCE;
 
 	reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);

include/linux/platform_data/ti-sysc.h

@@ -49,6 +49,7 @@ struct sysc_regbits {
 	s8 emufree_shift;
 };
 
+#define SYSC_QUIRK_FORCE_MSTANDBY	BIT(20)
 #define SYSC_MODULE_QUIRK_AESS		BIT(19)
 #define SYSC_MODULE_QUIRK_SGX		BIT(18)
 #define SYSC_MODULE_QUIRK_HDQ1W		BIT(17)