regmap: add regmap_update_bits_base()

Current regmap has many similar update functions like below,
but the difference is very few.
	regmap_update_bits()
	regmap_update_bits_async()
	regmap_update_bits_check()
	regmap_update_bits_check_async()
Furthermore, we can add *force* write option too in the future.

This patch adds new regmap_update_bits_base() which is feature
merged function. Above functions can be merged into it by macro.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 1839434..28e50a3 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -691,6 +691,9 @@
 		    void *val, size_t val_len);
 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 		     size_t val_count);
+int regmap_update_bits_base(struct regmap *map, unsigned int reg,
+			    unsigned int mask, unsigned int val,
+			    bool *change, bool async, bool force);
 int regmap_update_bits(struct regmap *map, unsigned int reg,
 		       unsigned int mask, unsigned int val);
 int regmap_write_bits(struct regmap *map, unsigned int reg,
@@ -937,6 +940,14 @@
 	return -EINVAL;
 }
 
+static inline int regmap_update_bits_base(struct regmap *map, unsigned int reg,
+					  unsigned int mask, unsigned int val,
+					  bool *change, bool async, bool force)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
 				     unsigned int mask, unsigned int val)
 {