drivers/mfd/ucb1x00-core.c:555: error: static declaration of 'ucb1x00_class' follows non-static declaration
drivers/mfd/ucb1x00.h:109: error: previous declaration of 'ucb1x00_class' was here

Since ucb1x00_class isn't used by anything, remove the extern
declaration and the symbol export.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add the core device support code for the Philips UCB1200 and
UCB1300 devices.  Also includes the following from Pavel:

This fixes u32 vs. pm_message_t confusion and uses cleaner
try_to_freeze() [fixing compilation as a side-effect on newer
kernels.]
Signed-off-by: NPavel Machek <pavel@suse.cz>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>