regmap: Add regmap_set/clear_bits shorthands

Port Linux kernel regmap_set/clear_bits shorthands to set and clear bits
in a regmap. These are handy if only specific bits needs to be applied
or cleared and makes it easier to port regmap based driver from kernel
upstream.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

include/regmap.h

@@ -361,6 +361,34 @@ int regmap_raw_read_range(struct regmap *map, uint range_num, uint offset,
  */
 int regmap_update_bits(struct regmap *map, uint offset, uint mask, uint val);
 
+/**
+ * regmap_set_bits() - Set bits to a regmap
+ *
+ * @map:	Regmap to write bits to
+ * @offset:	Offset in the regmap to write to
+ * @bits:	Bits to set to the regmap at the specified offset
+ *
+ * Return: 0 if OK, -ve on error
+ */
+static inline int regmap_set_bits(struct regmap *map, uint offset, uint bits)
+{
+	return regmap_update_bits(map, offset, bits, bits);
+}
+
+/**
+ * regmap_clear_bits() - Clear bits to a regmap
+ *
+ * @map:	Regmap to write bits to
+ * @offset:	Offset in the regmap to write to
+ * @bits:	Bits to clear to the regmap at the specified offset
+ *
+ * Return: 0 if OK, -ve on error
+ */
+static inline int regmap_clear_bits(struct regmap *map, uint offset, uint bits)
+{
+	return regmap_update_bits(map, offset, bits, 0);
+}
+
 /**
  * regmap_init_mem() - Set up a new register map that uses memory access
  *