global: Move remaining CONFIG_SYS_* to CFG_SYS_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do
not easily transition to Kconfig. In many cases they likely should come
from the device tree instead. Move these out of CONFIG namespace and in
to CFG namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/i2c/kona_i2c.c b/drivers/i2c/kona_i2c.c
index 4edcba2..b9b0ff1 100644
--- a/drivers/i2c/kona_i2c.c
+++ b/drivers/i2c/kona_i2c.c
@@ -129,7 +129,7 @@
 #define DEF_DEVICE(num) \
 {(void *)CONFIG_SYS_I2C_BASE##num, DEF_SPD, &std_cfg_table[DEF_SPD_ENUM]}
 
-static struct bcm_kona_i2c_dev g_i2c_devs[CONFIG_SYS_MAX_I2C_BUS] = {
+static struct bcm_kona_i2c_dev g_i2c_devs[CFG_SYS_MAX_I2C_BUS] = {
 #ifdef CONFIG_SYS_I2C_BASE0
 	DEF_DEVICE(0),
 #endif