This fixes the following warning by modpost:
WARNING: vmlinux.o(.data+0x15018): Section mismatch in reference from the variable pxa2xx_flash_driver to the function .init.text:pxa2xx_flash_probe()
The variable pxa2xx_flash_driver references
the function __init pxa2xx_flash_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,
I choosed to do this instead of using platform_driver_probe as the remove
function uses __devexit.