power: make most tps drivers and the twl4030 driver compatible with DM_I2C

Those driver are not DM drivers per se (not using the PMIC/regulator
framework) and are using the legacy I2C API. Make them compatible with
the DM_I2C API.

This impacts the following drivers:
- palmas (used by am57xx/dra7xx evms)
- tps65218 (used by am43xx evms)
- tps65217 and tps65910 (used by am335x evms and am335x boneblack vboot)
- twl4030 (used by omap3_logicpd)
- tps65217 (used by brppt1)
- twl6030

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/include/power/tps65217.h b/include/power/tps65217.h
index 00fbab8..669a94a 100644
--- a/include/power/tps65217.h
+++ b/include/power/tps65217.h
@@ -80,6 +80,8 @@
 #define TPS65217_PWR_SRC_USB_BITMASK		0x4
 #define TPS65217_PWR_SRC_AC_BITMASK		0x8
 
+int power_tps65217_init(unsigned char bus);
+
 int tps65217_reg_read(uchar src_reg, uchar *src_val);
 int tps65217_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
 		       uchar mask);