Fix some gcc warnings

Change-Id: I050ff01a3d18063a81ea050fc7901168406e989e
This patch fixes the following warning:

arch/arm/mm/alignment.c: In function 'do_alignment':
arch/arm/mm/alignment.c:327:15: warning: 'offset.un' may be used uninitialized in this function [-Wmaybe-uninitialized]
arch/arm/mm/alignment.c:749:21: note: 'offset.un' was declared here

The fix is to promote the initialization of offset into do_alignment().
Signed-off-by: Cyril Chemparathy <cyril@ti.com>

Change-Id: I6d8a0b45e446f245fbfede43b13c284c3d3161ff
Merge branch 'cm-11.0' into kk_mkt