ARM: s3c: delete unneed local variable "delay"

"delay" variable on line 79 can be deleted by returning "0" on line 88.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210624055627.22295-1-wangborong@cdjrlc.com
Link: https://lore.kernel.org/r/20210818204422.17919-1-krzysztof.kozlowski@canonical.com

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>