ARM: S5PV210: Update max8998_platform_data

Max8998 PMIC driver's platform data has been changed once again in
commit 735a3d9e

. This patch fixes build break caused by that commit.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>