msm: msi: correct HWIRQ mapping for all Synopsys MSI VIRQ

There is only 1 HWIRQ for all Synopsys MSI. Not all msi_irq
are correctly assigned with this HWIRQ. Correct the mappings for
all msi_irq (VIRQs).

Change-Id: I038462476e965a3fb2145962e0aa6ad23736536e
Signed-off-by: Tony Truong <truong@codeaurora.org>