Revert "drivers: omap-serial: hold wakelock when serial uart driver resumes"

This reverts commit 23881b334e8435eb97565c9ba28cab50d66c74e8.
Revert "board-latona: hold wake lock on WiLink awake"

This reverts commit e7d0efa86fbd3401f9dfafd6d4a1e48595bb441c.
Revert "board-latona: BT runtime PM adaptation"

This reverts commit f35f13937ae3654452296d2c60d0e6f127021f7a.
board: latona: hold a wakelock when WiLink chip is awake

The wakelock will be held 5 seconds max, which are enough to let
the userspace handle the serial UART RX data.