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

This patch fixes the following warnings:

drivers/clk/samsung/clk-s3c2443.c: In function ‘s3c2443_common_clk_init’:
drivers/clk/samsung/clk-s3c2443.c:390:3: warning: this statement may fall 
through [-Wimplicit-fallthrough=]
   samsung_clk_register_alias(ctx, s3c2450_aliases,
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     ARRAY_SIZE(s3c2450_aliases));
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/clk/samsung/clk-s3c2443.c:393:2: note: here
  case S3C2416:
  ^~~~

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

Notice that, in this particular case,  the code comment is modified
in accordance with what GCC is expecting to find.

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

Signed-off-by: Gustavo A. R. Silva <[email protected]>
---
 drivers/clk/samsung/clk-s3c2443.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/samsung/clk-s3c2443.c 
b/drivers/clk/samsung/clk-s3c2443.c
index 884067e4f1a1..f38f0e24e3b6 100644
--- a/drivers/clk/samsung/clk-s3c2443.c
+++ b/drivers/clk/samsung/clk-s3c2443.c
@@ -389,7 +389,7 @@ void __init s3c2443_common_clk_init(struct device_node *np, 
unsigned long xti_f,
                                ARRAY_SIZE(s3c2450_gates));
                samsung_clk_register_alias(ctx, s3c2450_aliases,
                                ARRAY_SIZE(s3c2450_aliases));
-               /* fall through, as s3c2450 extends the s3c2416 clocks */
+               /* fall through - as s3c2450 extends the s3c2416 clocks */
        case S3C2416:
                samsung_clk_register_div(ctx, s3c2416_dividers,
                                ARRAY_SIZE(s3c2416_dividers));
-- 
2.20.1

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