serial: 8250: omap: Remove unused wakeups_enabled

This field seems to be unused for quite some time already. Remove it.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20240807141227.1093006-3-msp@baylibre.com


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