mv_i2c: fix warnings on 64-bit builds

Change addresses to unsigned long to be compatible with 64-bit builds.
Signed-off-by: NRob Herring <robh@kernel.org>
Cc: Heiko Schocher <hs@denx.de>

drivers/i2c/mv_i2c.c

@@ -73,7 +73,7 @@ static void i2c_board_init(struct mv_i2c *base)
 }
 
 #ifdef CONFIG_I2C_MULTI_BUS
-static u32 i2c_regs[CONFIG_MV_I2C_NUM] = CONFIG_MV_I2C_REG;
+static unsigned long i2c_regs[CONFIG_MV_I2C_NUM] = CONFIG_MV_I2C_REG;
 static unsigned int bus_initialized[CONFIG_MV_I2C_NUM];
 static unsigned int current_bus;