tty: serial: samsung: embed s3c2410_uartcfg in parent structure

tty: serial: samsung: embed s3c2410_uartcfg in parent structure

Embed "struct s3c2410_uartcfg" directly as a member of "struct
s3c24xx_serial_drv_data" instead of keeping it as a pointer.  This makes
the code clearer (obvious ownership of "s3c2410_uartcfg
s3c24xx_serial_drv_data") and saves one pointer.

Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220308080919.152715-3-krzysztof.kozlowski@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>