[PATCH 4.5 62/87] xen/x86: actually allocate legacy interrupts on PV guests

4.5-stable review patch. If anyone has any objections, please let me know. -- From: Stefano Stabellini commit 702f926067d2a4b28c10a3c41a1172dd62d9e735 upstream. b4ff8389ed14 is incomplete: relies on nr_legacy_irqs() to get the number of legacy

[PATCH 4.5 62/87] xen/x86: actually allocate legacy interrupts on PV guests

4.5-stable review patch. If anyone has any objections, please let me know. -- From: Stefano Stabellini commit 702f926067d2a4b28c10a3c41a1172dd62d9e735 upstream. b4ff8389ed14 is incomplete: relies on nr_legacy_irqs() to get the number of legacy interrupts when actually