spi_qsd: Vote for PNOC clock before spi clock

spi core and ahb clocks are sourced from the PNOC clock.
so vote for PNOC clock before voting for the spi clocks
to avoid unclocked register access during the spi transactions
or accessing the registers from the debugfs.

Change-Id: Icf4512b2ff87612902ea7cfb2449a9625260074f
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>