sunxi: rsb: Move rsb_set_device_mode() call to rsb_init()

It turns out that the device_mode_data is rsb specific, rather then slave
specific, so integrate the rsb_set_device_mode() call into rsb_init().

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/include/asm/arch-sunxi/rsb.h b/arch/arm/include/asm/arch-sunxi/rsb.h
index 95a595a..a893466 100644
--- a/arch/arm/include/asm/arch-sunxi/rsb.h
+++ b/arch/arm/include/asm/arch-sunxi/rsb.h
@@ -37,6 +37,7 @@
 #define RSB_STAT_TERR_INT		(1 << 1)
 #define RSB_STAT_LBSY_INT		(1 << 2)
 
+#define RSB_DMCR_DEVICE_MODE_DATA	0x7c3e00
 #define RSB_DMCR_DEVICE_MODE_START	(1 << 31)
 
 #define RSB_CMD_BYTE_WRITE		0x4e
@@ -46,8 +47,7 @@
 #define RSB_DEVADDR_RUNTIME_ADDR(x)	((x) << 16)
 #define RSB_DEVADDR_DEVICE_ADDR(x)	((x) << 0)
 
-void rsb_init(void);
-int rsb_set_device_mode(u32 device_mode_data);
+int rsb_init(void);
 int rsb_set_device_address(u16 device_addr, u16 runtime_addr);
 int rsb_write(const u16 runtime_device_addr, const u8 reg_addr, u8 data);
 int rsb_read(const u16 runtime_device_addr, const u8 reg_addr, u8 *data);