kernel.h: remove ancient __FUNCTION__ hack

__FUNCTION__ hasn't been treated as a string literal since gcc 3.4, so
this only helps people who only test-compile using 3.3 (compiler-gcc3.h
barks at anything older than that).  Besides, there are almost no
occurrences of __FUNCTION__ left in the tree.

[akpm@linux-foundation.org: convert remaining __FUNCTION__ references]
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc arch/x86/kernel/hpet.c
Simple merge

diff --cc arch/x86/kernel/rtc.c
Simple merge

diff --cc arch/x86/platform/intel-mid/intel_mid_vrtc.c
Simple merge

diff --cc drivers/acpi/acpica/utdebug.c
Simple merge

diff --cc drivers/block/xen-blkfront.c
Simple merge

diff --cc include/acpi/acoutput.h
Simple merge

diff --cc include/linux/kernel.h
Simple merge