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/arch/arm/mach-exynos/spl_boot.c b/arch/arm/mach-exynos/spl_boot.c
index f518539..553dac7 100644
--- a/arch/arm/mach-exynos/spl_boot.c
+++ b/arch/arm/mach-exynos/spl_boot.c
@@ -141,7 +141,7 @@
 {
 	int upto, todo;
 	int i, timeout = 100;
-	struct exynos_spi *regs = (struct exynos_spi *)CONFIG_SYS_SPI_BASE;
+	struct exynos_spi *regs = (struct exynos_spi *)CFG_SYS_SPI_BASE;
 
 	set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
 	/* set the spi1 GPIO */