ARM: 9003/1: uncompress: Delete unused debug macros

The debug macros debug_reloc_start and debug_reloc_end were
rendered unused in commit 6d7d0ae5
"ARM: 6750/1: improvements to compressed/head.S".

Later on a different debug macro named dbgkc was introduced
in commit f3c89992
"ARM: 8786/1: Debug kernel copy by printing".

Delete the dead debug code.

Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>