i2c, zynq: convert zynq i2c driver to new multibus/multiadapter framework

- add zync i2c driver to new multibus/multiadpater support
- adapted all config files, which uses this driver

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index 298b17b..9dd9094 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -28,4 +28,4 @@
 obj-$(CONFIG_SYS_I2C_SH) += sh_i2c.o
 obj-$(CONFIG_SYS_I2C_SOFT) += soft_i2c.o
 obj-$(CONFIG_SYS_I2C_TEGRA) += tegra_i2c.o
-obj-$(CONFIG_ZYNQ_I2C) += zynq_i2c.o
+obj-$(CONFIG_SYS_I2C_ZYNQ) += zynq_i2c.o