Input: emu10k1-gp - add missing calls to pci_disable_device()

pci_disable_device() is called for following 2 cases
- error path in emu_probe()
- in emu_remove()

Signed-off-by: Rahul Ruikar <rahul.ruikar@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>