blackfin: adi gpio driver and pinctrl driver support

Remove gpio driver for new gpio controller on BF54x and BF60x.
Build the bfin_gpio driver only when other BF5xx processors are selected.
Replace the prefix of some gpio and peripheral functions with adi.
add portmux platform data in machine portmux.h

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Steven Miao <realmz6@gmail.com>

arch/blackfin/include/asm/irq.h

@@ -23,8 +23,7 @@
 /*
  * pm save bfin pint registers
  */
-struct bfin_pm_pint_save {
-	u32 mask_set;
+struct adi_pm_pint_save {
 	u32 assign;
 	u32 edge_set;
 	u32 invert_set;