serial: fsl_lpuart: Remove unneeded check for 'res'
serial: fsl_lpuart: Remove unneeded check for 'res'

'res' will be automatically checked inside devm_ioremap_resource(), so there is
no need to explicitly perform a NULL check.

Signed-off-by: Fabio Estevam <679188261afeb60eb822cd934fd7b46a48ddd743@freescale.com>
Acked-by: Jingchang Lu <fb3a389232f0cf8deda24f432d5b2b14574c605b@freescale.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs