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/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index aca7793..c882bd3 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -95,7 +95,7 @@
 	mrc	p15, 0, r0, c1, c0, 0
 	bic	r0, r0, #0x00000300	/* clear bits 9:8 (---- --RS) */
 	bic	r0, r0, #0x00000087	/* clear bits 7, 2:0 (B--- -CAM) */
-#ifdef CONFIG_SYS_EXCEPTION_VECTORS_HIGH
+#ifdef CFG_SYS_EXCEPTION_VECTORS_HIGH
 	orr	r0, r0, #0x00002000	/* set bit 13 (--V- ----) */
 #else
 	bic	r0, r0, #0x00002000	/* clear bit 13 (--V- ----) */