npu2: Fix missing iteration in tce kill loop
npu2: Fix missing iteration in tce kill loop

When killing multiple pages, npu2_tce_kill() loops doing single page
kills, but never advances the address. Fix this.

Signed-off-by: Reza Arbab <4c896a97e6b998365c2d50a267b0f1ca5f7995de@linux.ibm.com>
Reviewed-by: Andrew Donnellan <efc2d7c347a094a6ec1d918179e819039044c564@au1.ibm.com>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.ibm.com>

shenki/skiboot,open-power/skiboot,open-power/skiboot,shenki/skiboot,open-power/skiboot,legoater/skiboot,stewart-ibm/skiboot,stewart-ibm/skiboot,legoater/skiboot,legoater/skiboot,legoater/skiboot,qemu/skiboot,open-power/skiboot,qemu/skiboot,stewart-ibm/skiboot,qemu/skiboot,shenki/skiboot,shenki/skiboot,shenki/skiboot,qemu/skiboot,open-power/skiboot,legoater/skiboot,qemu/skiboot