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/doc/README.generic_usb_ohci b/doc/README.generic_usb_ohci
index 82fea62..767614c 100644
--- a/doc/README.generic_usb_ohci
+++ b/doc/README.generic_usb_ohci
@@ -11,7 +11,7 @@
 
 	CONFIG_USB_OHCI_NEW: enable the new OHCI driver
 
-	CONFIG_SYS_USB_OHCI_REGS_BASE: defines the base address of the OHCI
+	CFG_SYS_USB_OHCI_REGS_BASE: defines the base address of the OHCI
 				registers
 
 	CONFIG_SYS_USB_OHCI_SLOT_NAME: slot name