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/common/spl/Kconfig.nxp b/common/spl/Kconfig.nxp
index 8da8553..fc696cf 100644
--- a/common/spl/Kconfig.nxp
+++ b/common/spl/Kconfig.nxp
@@ -26,7 +26,7 @@
 	bool "Ensures that CCSR is not relocated"
 	depends on PPC
 	help
-	  If this is defined, then CONFIG_SYS_CCSRBAR_PHYS will be forced to a
+	  If this is defined, then CFG_SYS_CCSRBAR_PHYS will be forced to a
 	  value that ensures that CCSR is not relocated.
 
 config TPL_SYS_CCSR_DO_NOT_RELOCATE
@@ -59,7 +59,7 @@
 config SPL_RELOC_STACK
 	hex "Address of the start of the stack SPL will use after relocation."
 	help
-	  If unspecified, this is equal to CONFIG_SYS_SPL_MALLOC_START.  Starting
+	  If unspecified, this is equal to CFG_SYS_SPL_MALLOC_START.  Starting
 	  address of the malloc pool used in SPL.  When this option is set the full
 	  malloc is used in SPL and it is set up by spl_init() and before that, the
 	  simple malloc() can be used if CONFIG_SYS_MALLOC_F is defined.