Kconfigs: Correct default of "0" on hex type entries

It is not a parse error to have a default value of "0" for a "hex" type
entry, instead of "0x0".  However, "0" and "0x0" are not treated the
same even by the tools themselves. Correct this by changing the default
value from "0" to "0x0" for all hex type questions that had the
incorrect default. Fix one instance (in two configs) of a default of "0"
being used on a hex question to be "0x0". Remove the cases where a
defconfig had set a value of "0x0" to be used as the default had been
"0".

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/Kconfig b/common/Kconfig
index cdb77a6..0b09bd6 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -1031,7 +1031,7 @@
 config BLOBLIST_SIZE_RELOC
 	hex "Size of bloblist after relocation"
 	default BLOBLIST_SIZE if BLOBLIST_FIXED || BLOBLIST_ALLOC
-	default 0 if BLOBLIST_PASSAGE
+	default 0x0 if BLOBLIST_PASSAGE
 	help
 	  Sets the size of the bloblist in bytes after relocation. Since U-Boot
 	  has a lot more memory available then, it is possible to use a larger