spi_qsd: Fix unclocked register access

Resources such as clocks were removed from runtime pm and only
enabled/disabled while processing a transfer.  (See commit
6a464ae2)
This causes an unclocked register access when the spi_setup
function is called outside of a transfer being processed.
This fixes the error by getting/putting the needed
resources during spi_setup.

CRs-Fixed: 695632
Change-Id: I78af0c3a2e5799daf350b8eabb7ead168175e092
Signed-off-by: Dan Sneddon <dsneddon@codeaurora.org>