[ARM] 5598/1: ep93xx: core.c typesafe vic_init

The EP93XX_VIC{1/2}_BASE defines are now typesafe due to
[ARM] 5573/1: ep93xx: ensure typesafe io.  The (void *) cast
is not needed when calling vic_init().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>