[2.6.22] powerpc: section mismatch for macmodes.c:mac_find_mode()

A vanilla 2.6.22 built for ppc32 and configured with CONFIG_FB_MACMODES=y, CONFIG_HOTPLUG=n,
and CONFIG_MODULES=y, triggers the following warning from modpost:

WARNING: drivers/built-in.o(__ksymtab+0x3b0): Section mismatch: reference to .init.text:mac_find_mode (between '__ksymtab_mac_find_mode' and '__ksymtab_mac_map_monitor_sense')

There's an EXPORT_SYMBOL(mac_find_mode), but mac_find_mode() is __devinit
and thus __init in this kernel.

/Mikael