ARM: s3c: add one more "fallthrough" statement in Jive

clang warns about one missing fallthrough that gcc ignores:

arch/arm/mach-s3c/mach-jive.c:250:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]

Add it here as well.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211116092053.4042799-1-arnd@kernel.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

arch/arm/mach-s3c/mach-jive.c

@@ -247,6 +247,7 @@ static int __init jive_mtdset(char *options)
 	case 1:
 		nand->nr_partitions = ARRAY_SIZE(jive_imageB_nand_part);
 		nand->partitions = jive_imageB_nand_part;
+		break;
 	case 0:
 		/* this is already setup in the nand info */
 		break;