fsl_upm compile failure.

[Dave Jones <davej@redhat.com>]

Hi Anton, 
 I tried reenabling CONFIG_MTD_NAND_FSL_UPM in the Fedora kernel
today (currently on 2.6.27-rc9-git1), and got the error below.

ERROR: "fsl_lbc_lock" [drivers/mtd/nand/fsl_upm.ko] undefined!

It seems that this isn't exported to modules.
diff below fixes this.  (Not tested yet, the Fedora ppc
 builders are a little slow).

	Dave

--- 

CONFIG_MTD_NAND_FSL_UPM can be built modular, but needs to
use fsl_lbc_lock, which isn't currently exported.

Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/arch/powerpc/sysdev/fsl_lbc.c b/arch/powerpc/sysdev/fsl_lbc.c
index 422c8fa..1c6c522 100644
--- a/arch/powerpc/sysdev/fsl_lbc.c
+++ b/arch/powerpc/sysdev/fsl_lbc.c
@@ -16,6 +16,7 @@
 #include <asm/fsl_lbc.h>
 
 spinlock_t fsl_lbc_lock = __SPIN_LOCK_UNLOCKED(fsl_lbc_lock);
+EXPORT_SYMBOL(fsl_lbc_lock);
 
 struct fsl_lbc_regs __iomem *fsl_lbc_regs;
 EXPORT_SYMBOL(fsl_lbc_regs);