[arch][arm][mmu] Handle shareable flag when compiling WITH_SMP
[arch][arm][mmu] Handle shareable flag when compiling WITH_SMP

Set shareable flag when mapping cachable memory for both L1 and L2 entries
when compiling WITH_SMP.

Change-Id: I6c371a7b86f33dd8e93d20079848d1ee8f1fc0c4

skabet/lk,srodrig1/lk,littlekernel/lk,GCrean/lk,srodrig1/lk,minglun-tsai/lk,sndnvaps/lk,littlekernel/lk,srodrig1/lk,nvll/lk,nvll/lk,ErikCorryGoogle/lk,GCrean/lk,hollanderic/lkstuff,nvll/lk,srodrig1/lk,sndnvaps/lk,travisg/lk,ErikCorryGoogle/lk,ErikCorryGoogle/lk,skabet/lk,littlekernel/lk,srodrig1/lk,hollanderic/lkstuff,nvll/lk,hollanderic/lkstuff,skabet/lk,minglun-tsai/lk,nvll/lk,travisg/lk,sndnvaps/lk,littlekernel/lk,GCrean/lk,ErikCorryGoogle/lk,skabet/lk,minglun-tsai/lk,travisg/lk,hollanderic/lkstuff,GCrean/lk,sndnvaps/lk,GCrean/lk,skabet/lk,travisg/lk,sndnvaps/lk,minglun-tsai/lk