Input: sparcspkr - avoid unannotated fall-through

Fix follow warnings with clang-21i (and reformat for clarity):
  drivers/input/misc/sparcspkr.c:78:3: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
     78 |                 case SND_TONE: break;
        |                 ^
  drivers/input/misc/sparcspkr.c:78:3: note: insert 'break;' to avoid fall-through
     78 |                 case SND_TONE: break;
        |                 ^
        |                 break;
  drivers/input/misc/sparcspkr.c:113:3: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
    113 |                 case SND_TONE: break;
        |                 ^
  drivers/input/misc/sparcspkr.c:113:3: note: insert 'break;' to avoid fall-through
    113 |                 case SND_TONE: break;
        |                 ^
        |                 break;
  2 warnings generated.

Signed-off-by: WangYuli <wangyuli@uniontech.com>
Link: https://lore.kernel.org/r/6730E40353C76908+20250415052439.155051-1-wangyuli@uniontech.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: Avenger-285714

drivers/input/misc/sparcspkr.c

@@ -74,9 +74,14 @@ static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int
 		return -1;
 
 	switch (code) {
-		case SND_BELL: if (value) value = 1000;
-		case SND_TONE: break;
-		default: return -1;
+	case SND_BELL:
+		if (value)
+			value = 1000;
+		break;
+	case SND_TONE:
+		break;
+	default:
+		return -1;
 	}
 
 	if (value > 20 && value < 32767)
@@ -109,9 +114,14 @@ static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned
 		return -1;
 
 	switch (code) {
-		case SND_BELL: if (value) value = 1000;
-		case SND_TONE: break;
-		default: return -1;
+	case SND_BELL:
+		if (value)
+			value = 1000;
+		break;
+	case SND_TONE:
+		break;
+	default:
+		return -1;
 	}
 
 	if (value > 20 && value < 32767)