[PATCH] i3c: master: dw-i3c-master: mark expected switch fall-through

[Gustavo A. R. Silva]

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/i3c/master/dw-i3c-master.c: In function ‘dw_i3c_master_bus_init’:
drivers/i3c/master/dw-i3c-master.c:603:6: warning: this statement may fall 
through [-Wimplicit-fallthrough=]
   if (ret)
      ^
drivers/i3c/master/dw-i3c-master.c:605:2: note: here
  case I3C_BUS_MODE_PURE:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
 drivers/i3c/master/dw-i3c-master.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i3c/master/dw-i3c-master.c 
b/drivers/i3c/master/dw-i3c-master.c
index bb03079fbade..59279224e07f 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -602,6 +602,7 @@ static int dw_i3c_master_bus_init(struct 
i3c_master_controller *m)
                ret = dw_i2c_clk_cfg(master);
                if (ret)
                        return ret;
+               /* fall through */
        case I3C_BUS_MODE_PURE:
                ret = dw_i3c_clk_cfg(master);
                if (ret)
-- 
2.20.1