msm: fix compile failure on struct membank node member

In commit be370302
"ARM: Remove DISCONTIGMEM support", it removed this "node" member
which cased the following compile failure in mach-msm,

linux/arch/arm/mach-msm/board-halibut.c: In function 'halibut_fixup':
linux/arch/arm/mach-msm/board-halibut.c:86: error: 'struct membank' has no member named 'node'
linux/arch/arm/mach-msm/board-halibut.c:86: error: implicit declaration of function 'PHYS_TO_NID'

I've removed the access to the node member which corrects the
compile failure.
Signed-off-by: NDaniel Walker <dwalker@codeaurora.org>

arch/arm/mach-msm/board-halibut.c

@@ -83,7 +83,6 @@ static void __init halibut_fixup(struct machine_desc *desc, struct tag *tags,
 {
 	mi->nr_banks=1;
 	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
 	mi->bank[0].size = (101*1024*1024);
 }