lib/hexdump: remove hexdump32 and use hexdump instead

hexdump and hexdump32 do similar things, but hexdump32 is mostly a
reimplementation that has additional support to configure the console
log level, but has a very unexpected len parameter that isn't in bytes,
but in DWORDs.
With the move to hexdump() the console log level for the hexdump is
changed to BIOS_DEBUG.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6138d17f0ce8e4a14f22d132bf5c64d0c343b80d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54925
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/lib.h

@@ -29,7 +29,6 @@ int checkstack(void *top_of_stack, int core);
  * https://packages.debian.org/jessie/amd64/vim-common/filelist
  */
 void hexdump(const void *memory, size_t length);
-void hexdump32(char LEVEL, const void *d, size_t len);
 
 /*
  * hexstrtobin - Turn a string of ASCII hex characters into binary