ARM: S3C64XX: Declare IISv4 PCLK for S3C6410

[Updated the device ID to -1 since there's only one IISv4 device but the
S3C clock API tries to match based on the ID of the requesting device
(and not the name) -- broonie.]

Signed-Off-by: Jassi Brar <jassi.brar@samsung.com>
[ben-linux@fluff.org: Fixed Jassi's lastname]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>