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/mvtwsi.c b/drivers/i2c/mvtwsi.c
index f48a4f2..a9c7d6e 100644
--- a/drivers/i2c/mvtwsi.c
+++ b/drivers/i2c/mvtwsi.c
@@ -42,7 +42,7 @@
 #endif /* CONFIG_DM_I2C */
 
 /*
- * On SUNXI, we get CONFIG_SYS_TCLK from this include, so we want to
+ * On SUNXI, we get CFG_SYS_TCLK from this include, so we want to
  * always have it.
  */
 #if CONFIG_IS_ENABLED(DM_I2C) && defined(CONFIG_ARCH_SUNXI)
@@ -427,9 +427,9 @@
 static uint twsi_calc_freq(const int n, const int m)
 {
 #ifdef CONFIG_ARCH_SUNXI
-	return CONFIG_SYS_TCLK / (10 * (m + 1) * (1 << n));
+	return CFG_SYS_TCLK / (10 * (m + 1) * (1 << n));
 #else
-	return CONFIG_SYS_TCLK / (10 * (m + 1) * (2 << n));
+	return CFG_SYS_TCLK / (10 * (m + 1) * (2 << n));
 #endif
 }