ARM: 5881/1: vic.c: reorganize code

This reorganizes the vic.c code in anticipation of a second patch
to use struct vic_device as the data stored in set_irq_chip_data().

The code now has the following flow:

1) struct vic_device definition, static variables, and to_vic()
   moved to the start of the code.
2) common code (vic_init2)
3) vic power management callbacks
4) vic power management initialization/registration
5) irq_chip callbacks
6) vendor specific vic initialization
7) vic initialization

In addition the typo vik_init_st is fixed (vic_init_st).

There is no functional change with this patch.
Tested-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Alessandro Rubini <rubini-list@gnudd.com>

Comments from Hartley Sweeten:

 Please change from Cc to:
Tested-by: Alessandro Rubini <rubini@unipv.it>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>