i2c: designware: Convert driver to multibus/multiadapter framework

In preparation for the SoCFPGA support of the designware I2C driver,
convert this driver to the common CONFIG_SYS_I2C framework.

This patch converts all users of this driver, this is:

- ST spearxxx boards
- AXS101 (ARC700 platform)

I couldn't test this patch on those boards. Only compile tested for all
spear boards. And tested on SoCFPGA.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Tested-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Vipin Kumar <vk.vipin@gmail.com>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
diff --git a/arch/arm/cpu/arm926ejs/spear/cpu.c b/arch/arm/cpu/arm926ejs/spear/cpu.c
index 3757ffb..697e094 100644
--- a/arch/arm/cpu/arm926ejs/spear/cpu.c
+++ b/arch/arm/cpu/arm926ejs/spear/cpu.c
@@ -38,7 +38,7 @@
 #if defined(CONFIG_DW_UDC)
 	periph1_clken |= MISC_USBDENB;
 #endif
-#if defined(CONFIG_DW_I2C)
+#if defined(CONFIG_SYS_I2C_DW)
 	periph1_clken |= MISC_I2CENB;
 #endif
 #if defined(CONFIG_ST_SMI)