ARM: SAMSUNG: some GENERIC_HARDIRQS_NO_DEPRECATED build fixes

When GENERIC_HARDIRQS_NO_DEPRECATED is enabled, a number of struct
irq_desc members stop being directly accessible, and need to be
accessed via the irq_data struct instead -- this patch fixes up the
plat-samsung sites that still access those members directly.

Signed-off-by: Lennert Buytenhek <buytenh@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>