flattree: Use '\n', not ';' to separate asm pseudo-ops

The output of -Oasm is peculiar for assembler in that we want its output
to be portable across targets (it consists entirely of pseudo-ops and
labels, no actual instructions).

It turns out that while ';' is a valid instruction/pseudo-op separator
on most targets, it's not correct for all of them - e.g. HP PA-RISC.  So,
switch to using an actual \n instead.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

flattree.c

@@ -124,7 +124,8 @@ static void asm_emit_cell(void *e, cell_t val)
 {
 	FILE *f = e;
 
-	fprintf(f, "\t.byte 0x%02x; .byte 0x%02x; .byte 0x%02x; .byte 0x%02x\n",
+	fprintf(f, "\t.byte\t0x%02x\n" "\t.byte\t0x%02x\n"
+		"\t.byte\t0x%02x\n" "\t.byte\t0x%02x\n",
 		(val >> 24) & 0xff, (val >> 16) & 0xff,
 		(val >> 8) & 0xff, val & 0xff);
 }