pinctrl: icelake: Provide Interrupt Status register offset

Since some of the GPIO controllers use different Interrupt Status offset,
it make sense to provide it explicitly in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/pinctrl/intel/pinctrl-icelake.c

@@ -18,6 +18,7 @@
 #define ICL_PAD_OWN	0x020
 #define ICL_PADCFGLOCK	0x080
 #define ICL_HOSTSW_OWN	0x0b0
+#define ICL_GPI_IS	0x100
 #define ICL_GPI_IE	0x110
 
 #define ICL_GPP(r, s, e, g)				\
@@ -36,6 +37,7 @@
 		.padown_offset = ICL_PAD_OWN,		\
 		.padcfglock_offset = ICL_PADCFGLOCK,	\
 		.hostown_offset = ICL_HOSTSW_OWN,	\
+		.is_offset = ICL_GPI_IS,		\
 		.ie_offset = ICL_GPI_IE,		\
 		.pin_base = (s),			\
 		.npins = ((e) - (s) + 1),		\