[media] nuvoton-cir: improve logical device handling

Only enable the logical devices after the registers have been initialized.

The call to nvt_enable_logical_dev in nvt_resume is not needed as this is
done implicitely by nvt_cir_regs_init now.

[mchehab@osg.samsung.com: fixed multiline comment to kernel CodingStyle]
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>