ramips: Fix comment in rt3052 ethernet switch driver.

ramips: Fix comment in rt3052 ethernet switch driver.

Line 461 is actually enabling all switch ports by setting the disable bits
to 0. This needs to be done because the bootloader sets all ports to disabled
by default (which is the case for at least one router based on RT5350).

So, this patch fixes the comment in line 460.

Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>
git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@48095 3c298f89-4303-0410-b956-a3cf2f4a3e73