ARM: 8373/1: disable branch profiling in uncompressor

The branch profiling code cannot work outside of the main
kernel and just causes link errors if we try to use it in
the decompressor. Disabling it here matches what we do
for other architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>