soc: swr-mstr: Enable device wakeup only for tx macro

At bootup device wakeup enable is called for all masters
causing issue for wsa on lahaina. This is because wsa
supports interrupts on lahaina. Thus enable device wakeup
only for tx master.

Change-Id: Ia53df31427e54d5fd981cd650e1b0f06cb2d47b5
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>