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/mmc/sh_sdhi.c b/drivers/mmc/sh_sdhi.c
index b2d0fac..3ce7cbf 100644
--- a/drivers/mmc/sh_sdhi.c
+++ b/drivers/mmc/sh_sdhi.c
@@ -761,7 +761,7 @@
 	struct mmc *mmc;
 	struct sh_sdhi_host *host = NULL;
 
-	if (ch >= CONFIG_SYS_SH_SDHI_NR_CHANNEL)
+	if (ch >= CFG_SYS_SH_SDHI_NR_CHANNEL)
 		return -ENODEV;
 
 	host = malloc(sizeof(struct sh_sdhi_host));