[SPARC64]: Remove DEBUG_BOOTMEM.

We'll replace it in the future with better logging facilities that can
be enabled at run time.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc arch/sparc64/Kconfig.debug
Simple merge

diff --cc arch/sparc64/defconfig
Simple merge

diff --cc arch/sparc64/mm/init.c
Simple merge