spi: spi-msm-geni: Keep IRQ disabled before irq registration

This change disables the interrupt while requesting the IRQ else it
may cause interrupt imbalance. We are following similar way for all
the buses drivers.

Change-Id: I92c7ca2a3e6d58ef6aff5bbb577553b85596bb8c
Signed-off-by: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>