pinctrl: mvebu: armada-xp: provide generic mpp callbacks

We want to get rid of passing register addresses to common pinctrl
driver, so provide set/get callbacks that use generic mpp pins helper
and will be used later.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

drivers/pinctrl/mvebu/pinctrl-armada-xp.c

@@ -33,6 +33,18 @@
 
 #include "pinctrl-mvebu.h"
 
+static void __iomem *mpp_base;
+
+static int armada_xp_mpp_ctrl_get(unsigned pid, unsigned long *config)
+{
+	return default_mpp_ctrl_get(mpp_base, pid, config);
+}
+
+static int armada_xp_mpp_ctrl_set(unsigned pid, unsigned long config)
+{
+	return default_mpp_ctrl_set(mpp_base, pid, config);
+}
+
 enum armada_xp_variant {
 	V_MV78230	= BIT(0),
 	V_MV78260	= BIT(1),