pinctrl: intel: Simplify offset validation in intel_get_padcfg()

There is more generic and simpler validation just against the nregs.
Using it allows to drop customization from the intel_get_padcfg().

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

drivers/pinctrl/intel/pinctrl-intel.c

@@ -165,7 +165,7 @@ static void __iomem *intel_get_padcfg(struct intel_pinctrl *pctrl,
 	padno = pin_to_padno(community, pin);
 	nregs = (community->features & PINCTRL_FEATURE_DEBOUNCE) ? 4 : 2;
 
-	if (reg == PADCFG2 && !(community->features & PINCTRL_FEATURE_DEBOUNCE))
+	if (reg >= nregs * 4)
 		return NULL;
 
 	return community->pad_regs + reg + padno * nregs * 4;