drivers: tty: serial: sh-sci: fix spelling typo of 'wheter'

wheter -> whether

Signed-off-by: Wang Qing <wangqing@vivo.com>
Link: https://lore.kernel.org/r/1615345622-2015-1-git-send-email-wangqing@vivo.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>