staging: ccree: mark debug_regs[] as static

The global array clashes with an existing symbol of the same name:

drivers/staging/ccree/cc_debugfs.o:(.data+0x0): multiple definition of `debug_regs'
drivers/mmc/host/s3cmci.o:(.data+0x70): first defined here

We should fix both, this one addresses the ccree driver by removing
the symbol from the global namespace.

Fixes: 9bdd203b ("s3cmci: add debugfs support for examining driver and hardware state")
Fixes: b3ec9a67 ("staging: ccree: staging: ccree: replace sysfs by debugfs interface")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>