A set of interrupt chip driver fixes:

 - Fix the multi vector MSI allocation on Armada 370XP.

 - Do interrupt acknowledgement correctly in the aspeed-scu driver.

 - Make the IPR register offset correct in the NVIC driver.

 - Make redistribution table flushing correct by issueing a SYNC command to
   ensure that the invalidation command has been executed.

 - Plug a device tree node reference leak in the bcm7210-l2 driver.

 - Trivial fixes in the MIPS GIC and the Apple AIC drivers