arm: msm: Convert irq-vic to generic irq chip

[Linus Walleij]

2011/4/25 Abhijeet Dharmapurikar <adharmap at codeaurora.org>:

> - the common one uses some PL190 registers, not sure what that is.

PL190 is ARMs name for the VIC: PrimeCell 190.

Every vendor get these PrimeCells as part of their bargin for CPU
cores when licensing ARM IP. Then they tweak them to suit their
needs and fix hardware bugs.

It seems Qualcomm HW engineers did the same thing as everyone
else, tweak a PrimeCell by editing VHDL until it works...

Yours,
Linus Walleij